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Certain synonyms

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Very confident; certain:
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  1. Very confident; certain:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
Made certain; guaranteed:
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  1. Made certain; guaranteed:
  2. Guaranteed
  3. Confident; sure of oneself
That will not fail; always effective
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  1. That will not fail; always effective
  2. (Obs.) Secure or safe
  3. Not hesitating or wavering; firm:
Unquestionable; indubitable
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  1. Unquestionable; indubitable
  2. Asking no questions; unquestioning.
  3. (Rare) Certain; indubitable; unquestionable; not admitting of question or doubt.
In a state of satisfaction.
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  1. In a state of satisfaction.
  2. Full of or showing satisfaction:
Confident in one's abilities.
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  1. Confident in one's abilities.
(Of persons, states of mind, beliefs, etc.) Experiencing or harboring no doubts; entirely confident.
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  1. (Of persons, states of mind, beliefs, etc.) Experiencing or harboring no doubts; entirely confident.
Never doubted; always steady and on course
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  1. Never doubted; always steady and on course
Reliable; dependable:
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  1. Reliable; dependable:
  2. Not likely to fail or give way; stable:
  3. Reliable; dependable
Not disturbed or distracted.
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  1. Not disturbed or distracted.
  2. Without trouble or disturbance; calm:
Not concerned
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  1. Not concerned
  2. Not interested; indifferent
  3. Not worried, anxious or apprehensive.
Not disturbed; calm.
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Having one's mind made up; decided; resolved
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  1. Having one's mind made up; decided; resolved
  2. Decided or resolved:
  3. Marked by or showing determination; resolute:
Particular; specific:
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  1. Particular; specific:
  2. Designed for use in an express rifle:
  3. Made for or suited to a special purpose
In a state of believing, especially from evidence but not necessarily.
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  1. In a state of believing, especially from evidence but not necessarily.
  2. Persuaded, or otherwise feeling certainty
Boldly self-assured; confident without being aggressive
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  1. Boldly self-assured; confident without being aggressive
  2. Characterized by assertion; persistently, forcefully, or boldly positive or confident
  3. Inclined to bold or confident assertion; aggressively self-assured.
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  1. (Informal) too confident; overconfident
  2. Too sure; overconfident.
Beyond dispute or doubt; undeniable:
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  1. Beyond dispute or doubt; undeniable:
  2. That cannot be disputed or doubted; unquestionable
  3. Not disputable; not open to question; obviously true
Beyond question or doubt.
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  1. Beyond question or doubt.
  2. Not to be questioned, doubted, or disputed; certain
  3. Undeniable, obvious
  1. Guaranteed
  2. Made certain; guaranteed:
  3. Made sure; certain
Driven by or generating power directly through intermediate machine parts having little or no play:
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  1. Driven by or generating power directly through intermediate machine parts having little or no play:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
(Law) Of or relating to permanent, immovable things
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  1. (Law) Of or relating to permanent, immovable things
  2. Free of pretense, falsehood, or affectation:
  3. Actual; not merely possible or ideal
Consistent with fact or reality; not false or erroneous:
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  1. Consistent with fact or reality; not false or erroneous:
  2. Quick and exact in sensing and responding:
  3. Exactly conforming to a rule, standard, or pattern:
Honestly felt or experienced:
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  1. Honestly felt or experienced:
  2. Actual; real:
  3. Really being what it is said to be or coming from the alleged source or origin; not counterfeit or artificial; real; true; authentic
Not elaborate or complicated; simple:
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  1. Not elaborate or complicated; simple:
  2. Marked by little or no ornamentation or decoration:
  3. Not complicated; simple
Containing nothing:
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  1. Containing nothing:
  2. Easily perceptible to the eye or ear; distinct:
  3. Free from flaw, blemish, or impurity:
Not doubted or questioned; accepted:
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  1. Not doubted or questioned; accepted:
  2. Not doubted, called in question, or disputed; certain
  3. Without doubt; without question; certain.
Too apparent to be doubted; unquestionable.
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  1. Too apparent to be doubted; unquestionable.
  2. Clearly true; providing no possibility of doubt.
  3. That cannot be doubted; unquestionable
Unique, such that it cannot be mistaken for something else.
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  1. Unique, such that it cannot be mistaken for something else.
  2. Impossible to mistake or misinterpret; obvious:
  3. That cannot be mistaken or misinterpreted; leaving room for no misunderstanding; clear; plain
Not subject to attack or seizure; impregnable:
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  1. Not subject to attack or seizure; impregnable:
  2. That cannot be successfully denied
  3. Impossible to dispute or disprove; undeniable:
That will not fail; always effective
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  1. That will not fail; always effective
  2. That cannot be doubted, questioned, or disputed; absolutely true; certain
  3. Impossible to doubt or dispute; certain:
That cannot be controverted; not disputable or debatable; undeniable
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  1. That cannot be controverted; not disputable or debatable; undeniable
  2. Impossible to dispute; unquestionable:
That cannot be denied; indisputable
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  1. That cannot be denied; indisputable
  2. Irrefutable, or impossible to deny
  3. Difficult or impossible to deny; irrefutable:
Certain; positive
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  1. Certain; positive
  2. Precise and clear in meaning; explicit
  3. Clearly defined; explicitly precise:
Highest in quality, achievement, performance, etc.; most excellent
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  1. Highest in quality, achievement, performance, etc.; most excellent
  2. Greatest in power, authority, or rank; paramount or dominant.
  3. Final; ultimate
Not modified by conditions or reservations; absolute:
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  1. Not modified by conditions or reservations; absolute:
  2. Lacking the proper or required qualifications:
  3. Lacking the necessary or desirable qualifications; not fit
Incapable of error; never wrong
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  1. Incapable of error; never wrong
  2. Incapable of failing; certain:
  3. Not liable to fail, go wrong, make a mistake, etc.; dependable; reliable; sure
Not disputed or doubted:
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  1. Not disputed or doubted:
  1. Not missing the target.
  2. Committing no mistakes; consistently accurate.
  3. Not missing or failing; certain; sure; exact
Secure or stable:
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  1. Secure or stable:
  2. Financially secure or safe:
  3. Marked by or showing common sense and good judgment; levelheaded:
Capable of being relied on; dependable:
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  1. Capable of being relied on; dependable:
  2. Suitable or fit to be relied on; worthy of dependence or reliance; trustworthy
  3. (Signal processing, of a communication protocol) Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't
Worthy of trust; dependable; reliable
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  1. Worthy of trust; dependable; reliable
Easily perceived or understood; obvious.
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  1. Easily perceived or understood; obvious.
  2. Easy to see or perceive; clear; obvious; plain
That settles a question; final; decisive
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  1. That settles a question; final; decisive
  2. Serving to put an end to doubt, question, or uncertainty; decisive:
Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.
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  1. Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.
  2. Marked by promptness and decision.
  3. Having the quality of decision; showing determination or firmness
Having or exhibiting no ambiguity or uncertainty; clear.
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  1. Having or exhibiting no ambiguity or uncertainty; clear.
Based on competent authority; reliable because coming from one who is an expert or properly qualified
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  1. Based on competent authority; reliable because coming from one who is an expert or properly qualified
  2. Highly accurate or definitive; treated or worthy of treatment as a scholarly authority
  3. Having a commanding style.
That cannot be refuted or disproved
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  1. That cannot be refuted or disproved
  2. Impossible to refute or disprove; incontrovertible:
Not to be contested; indisputable; unquestionable
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  1. Not to be contested; indisputable; unquestionable
  2. Not contestable; indisputable; certain; incontrovertible.
  3. Impossible to contest; unquestionable:
Not subjected to inquiry
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  1. Not subjected to inquiry
  2. (Of a fact) Accepted without question; indisputable
  3. (Of a person) Not subjected to an interrogation
Perfect; complete; whole
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  1. Perfect; complete; whole
  2. Not doubted; actual; real
  3. (Law) Complete and unconditional; final:
Admitting of no doubt or misunderstanding; clear and unambiguous:
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  1. Admitting of no doubt or misunderstanding; clear and unambiguous:
  2. Unambiguous; without equivocation or ambiguity; singularly clear, unmistakable, or unquestionable
  3. Not equivocal; not ambiguous; plain; clear
That cannot be escaped or avoided; inevitable
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  1. That cannot be escaped or avoided; inevitable
  2. Impossible to escape or avoid; inevitable:
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  1. (Idiomatic) Intoxicated.
  2. (Idiomatic) Certain or extremely likely to occur; virtually assured of victory or success.
(Of an entertainment normally performed on the stage) performed by ice skaters as an ice show
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  1. (Of an entertainment normally performed on the stage) performed by ice skaters as an ice show
  2. (Idiomatic) not being used, or not to be used e.g.
Worthy of trust; dependable; reliable
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  1. Worthy of trust; dependable; reliable
Not exposed to the threat of danger or harm:
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  1. Not exposed to the threat of danger or harm:
  2. Usable in specified conditions without being damaged. Often used in combination:
  3. Free from danger or injury; undamaged or unhurt:
Secure or stable:
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  1. Secure or stable:
  2. In good health, both physically and mentally (sound of body and mind); marketable (property); undamaged, form taken by a document, as in “the complaint sounds in negligence.” In good health, both physically and mentally (sound of body and mind); marketable (property); undamaged, form taken by a document, as in “the complaint sounds in negligence.”
  3. Financially secure or safe:
Ready; prepared:
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  1. Ready; prepared:
  2. Unwilling or very reluctant to change:
  3. Established deliberately; intentional:
Arranged for a particular occasion or purpose:
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  1. Arranged for a particular occasion or purpose:
  2. Of a kind different from others; distinctive, peculiar, or unique
  3. Distinct among others of a kind:
Explicitly characterized by or having a particular linguistic feature. For example, girls is marked for plural in English, whereas sheep is not.
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  1. Explicitly characterized by or having a particular linguistic feature. For example, girls is marked for plural in English, whereas sheep is not.
  2. (Linguistics) Of or relating to that member of a pair of words or forms that explicitly denotes a particular subset of the meanings denoted by the other member of the pair. For example, of the two words lion and lioness, lion is unmarked for gender (it can denote either a male or female) whereas lioness is marked, since it denotes only females.
  3. Having one or more distinguishing marks.
Thoroughly explained; adequately commented.
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Being a single thing or unit; not two or more
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  1. Being a single thing or unit; not two or more
  2. Designating a person or thing as contrasted with or opposed to another or others
  3. (Informal) Used as an intensive:
(Informal) Remarkable, striking, etc.
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  1. (Informal) Remarkable, striking, etc.
  2. Being an unspecified number or quantity:
  3. Being a certain one or ones not specified or known
(Law) Of or having to do with an individual person; not shared or joint
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  1. (Law) Of or having to do with an individual person; not shared or joint
  2. (Law) Regarded as separate, especially with regard to tort liability or legal obligation, such that each individual involved is fully responsible for the liability or obligation.
  3. More than one but fewer than many (said of persons, places, or things); separate or distinct, but not requisitely independent (said of liability); various or differing (said of things). See also joint and several liability. More than one but fewer than many (said of persons, places, or things); separate or distinct, but not requisitely independent (said of liability); various or differing (said of things). See also joint and several liability.
Capable of being appreciated or estimated; large enough to be estimated; perceptible; considerable.
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  1. Capable of being appreciated or estimated; large enough to be estimated; perceptible; considerable.
  2. Enough to be perceived or estimated; noticeable; measurable
  3. Possible to estimate, measure, or perceive:
Recurring at set times or functioning in a normal way
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  1. Recurring at set times or functioning in a normal way
  2. Having all sides or faces equal. For example, a square is a regular polygon, and a cube is a regular polyhedron.
  3. Conforming in form, build, or arrangement to a rule, principle, type, standard, etc.; orderly; symmetrical
Of, belonging to, or associated with a specific person, group, thing, or category; not general or universal:
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  1. Of, belonging to, or associated with a specific person, group, thing, or category; not general or universal:
  2. Of or belonging to a single, definite person, part, group, or thing; not general; distinct
  3. Distinctive among others of the same group, category, or nature; noteworthy or exceptional:
(Archaic) Existing apart from others; separate; individual
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  1. (Archaic) Existing apart from others; separate; individual
  2. (Grammar) Of, relating to, or being a noun, pronoun, or adjective denoting a single person or thing or several entities considered as a single unit.
  3. Being the only one of its kind; single; unique
Peculiar to the individual; characteristic:
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  1. Peculiar to the individual; characteristic:
  2. Special; particular; outstanding; exceptional
  3. Relating to or directed toward a particular person, group, or purpose:
Distinct and correct in sound or meaning:
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  1. Distinct and correct in sound or meaning:
  2. (Sciences) Of experimental results, consistent, clustered close together, agreeing with each other. This does not mean that they cluster near the true, correct, or accurate value.
  3. Strictly distinguished from others; very:
Concerned particularly with the subject specified. Often used in combination:
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  1. Concerned particularly with the subject specified. Often used in combination:
  2. Intended for, applying to, or acting on a particular thing:
  3. Of a special, or particular, sort or kind
Legally or formally concluded; definite; final
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  1. Legally or formally concluded; definite; final
  2. Securely fixed in place:
  3. Not moved or shaken easily; fixed; stable
Being in a stable, combined form:
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  1. Being in a stable, combined form:
  2. Not changing, not able to be changed, staying the same.
  3. Established; settled; set
Having lost effervescence or sparkle:
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  1. Having lost effervescence or sparkle:
  2. Of or relating to a hierarchy with relatively few tiers or levels:
  3. Being one half step lower than the corresponding natural key:
Ready; prepared:
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  1. Ready; prepared:
  2. Unwilling or very reluctant to change:
  3. Established deliberately; intentional:
Not escapable; that cannot be avoided.
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  1. Not escapable; that cannot be avoided.
  2. Impossible to escape or avoid; inevitable:
Impossible to avoid or prevent; certain to happen.
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  1. Impossible to avoid or prevent; certain to happen.
  2. Invariably occurring or appearing; predictable:
Bound or destined to do, experience, or be something specified
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  1. Bound or destined to do, experience, or be something specified
  2. (Obs.) Secure or safe
  3. Not hesitating or wavering; firm:
That cannot be avoided; inevitable
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  1. That cannot be avoided; inevitable
  2. Impossible to avoid; bound to happen.
Having firm muscles; in good bodily trim; vigorous and robust
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  1. Having firm muscles; in good bodily trim; vigorous and robust
  2. Definite; firm:
  3. Showing disapproval, bitterness, or resentment:
Not to be contested; indisputable; unquestionable
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  1. Not to be contested; indisputable; unquestionable
  2. Not contestable; indisputable; certain; incontrovertible.
  3. Impossible to contest; unquestionable:
That cannot be controverted; not disputable or debatable; undeniable
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  1. That cannot be controverted; not disputable or debatable; undeniable
  2. Impossible to dispute; unquestionable:
Beyond dispute or doubt; undeniable:
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  1. Beyond dispute or doubt; undeniable:
  2. Not disputable; not open to question; obviously true
  3. That cannot be disputed or doubted; unquestionable
Too apparent to be doubted; unquestionable.
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  1. Too apparent to be doubted; unquestionable.
  2. Clearly true; providing no possibility of doubt.
  3. That cannot be doubted; unquestionable
Impossible to refute or disprove; incontrovertible:
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  1. Impossible to refute or disprove; incontrovertible:
  2. That cannot be refuted or disproved
Very confident; certain:
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  1. Very confident; certain:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
Bound or destined to do, experience, or be something specified
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  1. Bound or destined to do, experience, or be something specified
  2. That will not fail; always effective
  3. Having one's course directed; destined or bound:
Not subject to attack or seizure; impregnable:
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  1. Not subject to attack or seizure; impregnable:
  2. That cannot be successfully denied
  3. Impossible to dispute or disprove; undeniable:
That cannot be denied; indisputable
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  1. That cannot be denied; indisputable
  2. Irrefutable, or impossible to deny
  3. Difficult or impossible to deny; irrefutable:
Common misspelling of indisputable.
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Beyond question or doubt.
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  1. Beyond question or doubt.
  2. Not to be questioned, doubted, or disputed; certain
  3. Undeniable, obvious
Precise and clear in meaning; explicit
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  1. Precise and clear in meaning; explicit
  2. Certain; positive
  3. Clearly defined; explicitly precise:
Very confident; certain:
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  1. Very confident; certain:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
Bound or destined to do, experience, or be something specified
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  1. Bound or destined to do, experience, or be something specified
  2. (Obs.) Secure or safe
  3. Not hesitating or wavering; firm:
Incapable of error; never wrong
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  1. Incapable of error; never wrong
  2. Incapable of erring:
  3. Not liable to fail, go wrong, make a mistake, etc.; dependable; reliable; sure
Reliable; dependable:
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  1. Reliable; dependable:
  2. Not likely to fail or give way; stable:
  3. Reliable; dependable
Bound or destined to do, experience, or be something specified
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  1. Bound or destined to do, experience, or be something specified
  2. (Obs.) Secure or safe
  3. Not hesitating or wavering; firm:
Free from error
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  1. Free from error
  2. Committing no mistakes; consistently accurate.
  3. Not missing or failing; certain; sure; exact
Never ceasing or falling short; inexhaustible
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  1. Never ceasing or falling short; inexhaustible
  2. Always reliable; certain
  3. Always able to supply more; inexhaustible:
Bound to be successful or perform as expected:
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  1. Bound to be successful or perform as expected:
Feeling or showing confidence in oneself; self-assured:
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  1. Feeling or showing confidence in oneself; self-assured:
  2. Feeling or showing certainty, as of success:
  3. Sure of oneself; self-confident; bold
Very confident; certain:
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  1. Very confident; certain:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
Bound or destined to do, experience, or be something specified
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  1. Bound or destined to do, experience, or be something specified
  2. (Obs.) Secure or safe
  3. Not hesitating or wavering; firm:
(Of persons, states of mind, beliefs, etc.) Experiencing or harboring no doubts; entirely confident.
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  1. (Of persons, states of mind, beliefs, etc.) Experiencing or harboring no doubts; entirely confident.

Synonym Study

  • Positive suggests unshakable confidence, esp. in the correctness of one's opinions or conclusions, sometimes to the point of dogmatism he's too positive in his beliefs
  • Confident stresses the firmness of one's certainty or sureness, esp. in some expectation she's confident she'll win
  • Sure suggests merely an absence of doubt or hesitancy I'm sure you don't mean it
  • Certain usually suggests conviction based on specific grounds or evidence this letter makes me certain of his innocence
Find another word for certain. In this page you can discover 141 synonyms, antonyms, idiomatic expressions, and related words for certain, like: positive, assured, sure, questionless, satisfied, self-confident, undoubting, unwavering, believing, secure and untroubled.