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See more synonyms for affirm on Thesaurus.com
verb (used with object)
  1. to state or assert positively; maintain as true: to affirm one's loyalty to one's country; He affirmed that all was well.
  2. to confirm or ratify: The appellate court affirmed the judgment of the lower court.
  3. to assert solemnly: He affirmed his innocence.
  4. to express agreement with or commitment to; uphold; support: to affirm human rights.
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verb (used without object)
  1. Law.
    1. to state something solemnly before a court or magistrate, but without oath.
    2. to ratify and accept a voidable transaction.
    3. (of an appellate court) to determine that the action of the lower court shall stand.
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Origin of affirm

1300–50; < Latin affirmāre, equivalent to af- af- + firmāre to make firm (see firm1); replacing Middle English a(f)fermen < Middle French afermer < Latin
Related formsaf·firm·a·ble, adjectiveaf·firm·a·bly, adverbaf·firm·er, nounaf·firm·ing·ly, adverbo·ver·af·firm, verbpre·af·firm, verbre·af·firm, verb (used with object)un·af·firmed, adjective

Synonyms for affirm

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Synonym study

1. See declare.

Antonyms for affirm

1. deny.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for reaffirm

restore, repeat, extend, resume, revive, prolong, reopen, continue, restate, reestablish, reaffirm, exhilarate, reinvigorate, recreate, refurbish, remodel, resuscitate, refit, disclose, claim

Examples from the Web for reaffirm

Contemporary Examples of reaffirm

Historical Examples of reaffirm

  • But she stayed with her decision and often had to reaffirm it.

  • It was decided to reaffirm the "gude and lovable" Act of 1427.

    The Scottish Parliament

    Robert S. (Robert Sangster) Rait

  • Do you not think it wrong to affirm and reaffirm what is substantially untrue?


    Charlotte Bront

  • It was enough simply to reaffirm the fundamental principles of democracy.

  • And I need only add that I reaffirm what I have written with entire sincerity.

British Dictionary definitions for reaffirm


verb (tr)
  1. to affirm (a claim, etc) again; reassert
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Derived Formsreaffirmation, noun


verb (mainly tr)
  1. (may take a clause as object) to declare to be true; assert positively
  2. to uphold, confirm, or ratify
  3. (intr) law to make an affirmation
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Derived Formsaffirmer or affirmant, noun

Word Origin for affirm

C14: via Old French from Latin affirmāre to present (something) as firm or fixed, assert, from ad- to + firmāre to make firm 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for reaffirm



c.1300, from Old French afermier (Modern French affirmer) "affirm, confirm; strengthen, consolidate," from Latin affirmare "to make steady, strengthen," figuratively "confirm, corroborate," from ad- "to" (see ad-) + firmare "strengthen, make firm," from firmus "strong" (see firm (adj.)). Spelling refashioned 16c. in French and English on Latin model. Related: Affirmed; affirming.

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Online Etymology Dictionary, © 2010 Douglas Harper