Necessary synonyms

nĕs'ĭ-sĕr'ē
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(Biochemistry) Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet:
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Obligatory:
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Conveying a sense of pressing importance:
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(Gram.) Designating or of the mood of a verb that expresses a command, strong request, or exhortation
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Calling for immediate attention; urgent
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Obligatory; required:
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The definition of requisite is something required or necessary.
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Convenient but based on a concern for self-interest rather than principle:
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The definition of needful is something that is required.
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The definition of indispensable is essential or absolutely necessary.
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Relating to what is basic; radical
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Fairly large in amount or quantity:
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Required or commanded by authority; obligatory:
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The definition of basic is something that is essential, or something with a pH level higher than 7.
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Highest in rank, power, or authority:
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Imposing obligation, morally or legally; binding: an obligatory promise.
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Drivingly forceful:
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Essential
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Essential
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Essential
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Essential
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Incapable of being dispensed with
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Something that nourishes; food.
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Necessary; being needed.
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Required beforehand, esp. as a necessary condition for something following
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Demanding; needing great effort.
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Necessary to continued existence.
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Describing a "natural" number used to indicate quantity (e.g., one, two, three), as opposed to an ordinal number indicating relative position.
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Of the greatest importance; crucial.
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Thoroughly explained; adequately commented.
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That cannot be avoided; inevitable
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Marked by promptness and decision.
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Vital to the resolution of a crisis or the determination of an outcome:
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The definition of elementary is something simple and basic, or the entry-level into something.
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Of the nature of a quintessence (in all senses); ultimate.
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Highest, as in rank or office; foremost
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The definition of principal is the first or highest in importance.
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First in excellence, quality, or value.
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Innate, inherent, inseparable from the thing itself, essential.
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Firmly in position; stationary:
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The definition of constant is something that doesn't change or something that continues or remains steady.
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Lasting for an indefinitely long time.
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Existing as an essential constituent or characteristic; intrinsic:
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Firmly fixed or established
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That cannot be denied; indisputable
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Assured is defined as something that is definite.
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Not important; insignificant or petty.
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Void of essence, or real being.
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The definition of insignificant is someone or something that is small, lacking in power, or otherwise not important.
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Having or suggesting a consciousness of high position or authority; authoritative:
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Named but not known or previously mentioned:
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Likely to happen without delay; impending; often, specif., threatening, looming, etc.
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The definition of inevitable is something that is certain to happen.
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Possible, but not certain to happen.
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Required by fashion; fashionable
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Imposed on someone as an obligation, especially due to one's office.
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Incapable of being dispensed with
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Impossible to stop or prevent; inevitable
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Possessing everything essential; entire.
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Something considered necessary or highly desirable.
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Essential quality, fact, or thing
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Pressing needs; demands; requirements
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The characteristic of being indispensable.
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The state or fact of being in need.
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A condition of poverty or misfortune:
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A binding, formal arrangement or an agreement to a liability to pay a specified amount or to do a certain thing for a person or group of persons. See also duty and liability.
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(Engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a) be deemed unacceptable, or (b) result in implementation failure, or (c) result in system failure.
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(Philos.) The status of something that exists in itself as an individual whole
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To suit; to befit.
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Coming without regularity; occasional or incidental.
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Being a substance that is required for normal functioning but does not need to be included in the diet because of the body's ability to synthesize it from other nutrients:
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The definition of optional is available, but not required.
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Not needed or necessary.
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(Of a law, rule, vow, etc.) Subject to dispensation; possible to relax, exempt from, or annul.
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Not essential; unessential.
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(Colloquial, of a person) unable to do well at a particular task or thing. Useless is mildly insulting.
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(Law) Without legal obligation or consideration:
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Capable of happening, existing, or being true without contradicting proven facts, laws, or circumstances:
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Logically inevitable:
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Imposing or commanding adherence to a commitment, an obligation, or a duty:
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(Bot.) Borne at the apex of the support, as an anther
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Essential
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Of, or having the nature of, a statute or statutes
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Find another word for necessary. In this page you can discover 92 synonyms, antonyms, idiomatic expressions, and related words for necessary, like: essential, required, urgent, imperative, pressing, compulsory, requisite, wanted, expedient, needful and indispensable.