Firm or obstinate, as in making a demand or maintaining a stand

• urgent

  1. Calling for haste, immediate action, etc.; grave; pressing
  2. Conveying a sense of pressing importance:
  3. Insistent; importunate

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  1. Calling for haste, immediate action, etc.; grave; pressing
  2. Conveying a sense of pressing importance:
  3. Insistent; importunate

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• insistent

  1. Repetitive and persistent:
  2. Demanding attention or a response:
  3. Insisting or demanding; persistent in demands or assertions

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  1. Repetitive and persistent:
  2. Demanding attention or a response:
  3. Insisting or demanding; persistent in demands or assertions

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• importune

  1. Importunate.

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  1. Importunate.

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• importunate

  1. (Obs.) Troublesome
  2. Troublesomely urgent or persistent in requesting; pressingly entreating:
  3. Urgent or persistent in asking or demanding; insistent; refusing to be denied; annoyingly urgent or persistent

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  1. (Obs.) Troublesome
  2. Troublesomely urgent or persistent in requesting; pressingly entreating:
  3. Urgent or persistent in asking or demanding; insistent; refusing to be denied; annoyingly urgent or persistent

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Existing or occurring without interruption or end

• unremitting

  1. Never slackening; persistent.
  2. Not stopping, relaxing, or slackening; incessant; persistent

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  1. Never slackening; persistent.
  2. Not stopping, relaxing, or slackening; incessant; persistent

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• uninterrupted

  1. Continuing with no interruption

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  1. Continuing with no interruption

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• unfailing

  1. Never ceasing or falling short; inexhaustible
  2. Always reliable; certain
  3. Constant; unflagging:

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  1. Never ceasing or falling short; inexhaustible
  2. Always reliable; certain
  3. Constant; unflagging:

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• unending

  1. Being or seeming to be without an end or limit; boundless.

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  1. Being or seeming to be without an end or limit; boundless.

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• unceasing

  1. Continuous; continuing indefinitely without stopping
  2. Not stopping; continuous.

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  1. Continuous; continuing indefinitely without stopping
  2. Not stopping; continuous.

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• timeless

  1. (Obs.) Untimely
  2. Restricted to no specific time; always valid, true, or applicable

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  1. (Obs.) Untimely
  2. Restricted to no specific time; always valid, true, or applicable

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• round-the-clock

  1. Continuously, all day long. From the concept that it happens while the hands of the clock go all the way around.
  2. Throughout the day and night; without interruption

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  1. Continuously, all day long. From the concept that it happens while the hands of the clock go all the way around.
  2. Throughout the day and night; without interruption

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• relentless

  1. Unyielding in severity or strictness; unrelenting:
  2. Persistent; unremitting
  3. Steady and persistent; unremitting:

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  1. Unyielding in severity or strictness; unrelenting:
  2. Persistent; unremitting
  3. Steady and persistent; unremitting:

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• perpetual

  1. Blooming continuously throughout the growing season
  2. Continuing or being so for an indefinitely long time:
  3. Continuing indefinitely without interruption; unceasing; constant

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  1. Blooming continuously throughout the growing season
  2. Continuing or being so for an indefinitely long time:
  3. Continuing indefinitely without interruption; unceasing; constant

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• ongoing

  1. Presently or currently happening; being in progress
  2. Continuing, permanent
  3. That is going on, or actually in process; continuing, progressing, etc.

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  1. Presently or currently happening; being in progress
  2. Continuing, permanent
  3. That is going on, or actually in process; continuing, progressing, etc.

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• nonstop

  1. Unceasing; unremitting:
  2. Without a stop; continual or continuous

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  1. Unceasing; unremitting:
  2. Without a stop; continual or continuous

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• interminable

  1. Without, or apparently without, end; lasting, or seeming to last, forever; endless

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  1. Without, or apparently without, end; lasting, or seeming to last, forever; endless

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• incessant

  1. Continuing without interruption.
  2. Never ceasing; continuing or being repeated without stopping or in a way that seems endless; constant
  3. Without pause or stop; not ending, especially to the point of annoyance.

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  1. Continuing without interruption.
  2. Never ceasing; continuing or being repeated without stopping or in a way that seems endless; constant
  3. Without pause or stop; not ending, especially to the point of annoyance.

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• everlasting

  1. Continuing indefinitely or for a long period of time.
  2. Going on too long or happening too often; seeming never to stop
  3. Lasting forever; eternal.

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  1. Continuing indefinitely or for a long period of time.
  2. Going on too long or happening too often; seeming never to stop
  3. Lasting forever; eternal.

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• eternal

  1. Forever the same; always true or valid; unchanging
  2. Continuing without interruption; perpetual:
  3. Seemingly endless; interminable:

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  1. Forever the same; always true or valid; unchanging
  2. Continuing without interruption; perpetual:
  3. Seemingly endless; interminable:

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• endless

  1. With the ends joined to form a closed unit that can move continuously over wheels, etc.
  2. Being or seeming to be without an end or limit; boundless:
  3. Formed with the ends joined; continuous:

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  1. With the ends joined to form a closed unit that can move continuously over wheels, etc.
  2. Being or seeming to be without an end or limit; boundless:
  3. Formed with the ends joined; continuous:

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• continuous

  1. (Mathematics) Of or relating to a line or curve that extends without a break or irregularity.
  2. (Math.) Designating a function whose value at each point is closely approached by its values at neighboring points
  3. Attached together in repeated units:

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  1. (Mathematics) Of or relating to a line or curve that extends without a break or irregularity.
  2. (Math.) Designating a function whose value at each point is closely approached by its values at neighboring points
  3. Attached together in repeated units:

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• continual

  1. Happening over and over again; repeated often; going on in rapid succession
  2. Recurring regularly or frequently:
  3. Not interrupted; steady:

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  1. Happening over and over again; repeated often; going on in rapid succession
  2. Recurring regularly or frequently:
  3. Not interrupted; steady:

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• constant

  1. Remaining steady in affections or loyalties; faithful
  2. Unchanging in nature, value, or extent; invariable:
  3. Continually occurring; persistent:

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  1. Remaining steady in affections or loyalties; faithful
  2. Unchanging in nature, value, or extent; invariable:
  3. Continually occurring; persistent:

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• ceaseless

  1. Without an end.
  2. Without stop or pause; constant.
  3. Unceasing; continual

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  1. Without an end.
  2. Without stop or pause; constant.
  3. Unceasing; continual

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• around-the-clock

  1. Round-the-clock
  2. All day and night; all of the time.

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  1. Round-the-clock
  2. All day and night; all of the time.

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Existing or remaining in the same state for an indefinitely long time

• permanent

  1. Not expected to change in status, condition, or place:
  2. Lasting a relatively long time
  3. Lasting or intended to last indefinitely without change

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  1. Not expected to change in status, condition, or place:
  2. Lasting a relatively long time
  3. Lasting or intended to last indefinitely without change

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• perennial

  1. Lasting an indefinitely long time; enduring:
  2. Lasting or active throughout the whole year
  3. Having a life cycle of more than two years: said esp. of herbaceous plants that produce flowers and seed from the same root structure year after year

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  1. Lasting an indefinitely long time; enduring:
  2. Lasting or active throughout the whole year
  3. Having a life cycle of more than two years: said esp. of herbaceous plants that produce flowers and seed from the same root structure year after year

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• perdurable

  1. Extremely durable; permanent.

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  1. Extremely durable; permanent.

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• old

  1. Made long ago; in existence for many years:
  2. Belonging to or being of an earlier time:
  3. Having or exhibiting the physical characteristics of age:

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  1. Made long ago; in existence for many years:
  2. Belonging to or being of an earlier time:
  3. Having or exhibiting the physical characteristics of age:

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• long-standing

  1. Having continued for a long time

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  1. Having continued for a long time

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• long-lived

  1. Having or tending to have a long life span or existence

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  1. Having or tending to have a long life span or existence

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• long-lasting

  1. Persisting or enduring for a long time.

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  1. Persisting or enduring for a long time.

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• lasting

  1. Continuing or remaining for a long time; enduring:

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  1. Continuing or remaining for a long time; enduring:

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• enduring

  1. Lasting; continuing; durable:
  2. Long-suffering; patient.
  3. Lasting; permanent; durable

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  1. Lasting; continuing; durable:
  2. Long-suffering; patient.
  3. Lasting; permanent; durable

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• durable

  1. Able to perform or compete over a long period, as by avoiding or overcoming injuries:
  2. Designating a power of attorney that remains in effect after the person who authorized it becomes incompetent
  3. Made to withstand repeated use over a relatively long period, usually several years or more:

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  1. Able to perform or compete over a long period, as by avoiding or overcoming injuries:
  2. Designating a power of attorney that remains in effect after the person who authorized it becomes incompetent
  3. Made to withstand repeated use over a relatively long period, usually several years or more:

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• continuing

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• abiding

  1. Lasting for a long time; enduring:
  2. Continuing without change; enduring; lasting
  3. Continuing or persisting in the same state; lasting; enduring. [First attested around 1350 to 1470.]

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  1. Lasting for a long time; enduring:
  2. Continuing without change; enduring; lasting
  3. Continuing or persisting in the same state; lasting; enduring. [First attested around 1350 to 1470.]

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Of long duration

• protracted

  1. Lasting for a long time or longer than expected or usual.

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  1. Lasting for a long time or longer than expected or usual.

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• prolonged

  1. Lengthy in duration; extended; protracted.

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  1. Lengthy in duration; extended; protracted.

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• lingering

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• continuing

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• chronic

  1. By habit, custom, etc.; habitual; inveterate
  2. Of long duration; continuing:
  3. Lasting for a long period of time or marked by frequent recurrence, as certain diseases:

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  1. By habit, custom, etc.; habitual; inveterate
  2. Of long duration; continuing:
  3. Lasting for a long period of time or marked by frequent recurrence, as certain diseases:

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Difficult to alleviate or cure

• stubborn

  1. Refusing to yield, obey, or comply; resisting doggedly or unreasonably; resolute or obstinate
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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  1. Refusing to yield, obey, or comply; resisting doggedly or unreasonably; resolute or obstinate
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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• pertinacious

  1. Hard to get rid of; unyielding; persistent
  2. Holding tenaciously or stubbornly to a purpose, opinion, or course of action:
  3. Holding firmly to some purpose, belief, or action, often stubbornly or obstinately

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  1. Hard to get rid of; unyielding; persistent
  2. Holding tenaciously or stubbornly to a purpose, opinion, or course of action:
  3. Holding firmly to some purpose, belief, or action, often stubbornly or obstinately

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• obstinate

  1. Unreasonably determined to have one's own way; not yielding to reason or plea; stubborn; dogged; mulish
  2. Difficult to manage, control, or treat:
  3. Characterized by such adherence:

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  1. Unreasonably determined to have one's own way; not yielding to reason or plea; stubborn; dogged; mulish
  2. Difficult to manage, control, or treat:
  3. Characterized by such adherence:

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