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Synonyms

impugn

American  
[im-pyoon] / ɪmˈpyun /

verb (used with object)

  1. to challenge as false (another's statements, motives, etc.); cast doubt upon.

    Synonyms:
    censure, criticize, malign, asperse, attack
  2. Archaic. to assail (a person) by words or arguments; vilify.

  3. Obsolete. to attack (a person) physically.


impugn British  
/ ˌɪmpʌɡˈneɪʃən, ɪmˈpjuːn /

verb

  1. (tr) to challenge or attack as false; assail; criticize

"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

Other Word Forms

Etymology

Origin of impugn

1325–75; Middle English impugnen < Middle French impugner < Latin impugnāre to attack, equivalent to im- im- 1 + pugnāre to fight, derivative of pugnus fist; see pugnacious

Explanation

To impugn means to call into question or attack as wrong. If your usually grumpy brother is suddenly nice and sweet, you'll impugn his motives if you're smart — he probably just wants something from you. The root of impugn is the Latin pugnare which means "to fight," so when you impugn, you are fighting or attacking, but by saying that something is false or wrong. If a candidate has a record that cannot be impugned, his or her opponent might go for a character attack. If you take pride in your work, you will be especially insulted if someone impugns your professionalism or integrity.

Keep Reading on Vocabulary.com

Vocabulary lists containing impugn

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In the latter, he said he did not impugn the jurors — who were not present — but was advising the just-acquitted defendant to stay out of trouble.

From Los Angeles Times • May 1, 2026

Ms. Nuzzi will not dignify efforts to impugn her character with any future response,” Nuzzi’s lawyer Ari Wilkenfeld said in a statement.

From The Wall Street Journal • Dec. 4, 2025

His public squabbling with colleagues was highly unusual, as was letting Rodgers impugn another ABC star.

From New York Times • Jan. 11, 2024

Whatever he knows that he has done to others, he tries to impugn upon the next person.

From Salon • Nov. 6, 2023

Miss Ponsonby had snubbed his friend, and to do that was to impugn the greatness of the man himself.

From The Locusts' Years by Fee, Mary Helen