American Heritage Dictionary
(1)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
While critical comment on stories & issues is welcomed, postings that descend to personal attacks on or impugn the integrity of other commentators will be blocked.— CathNews
The ASBL began requesting Mr. Stamler's communications after several journalists informed the organization that Mr. Stamler had libeled and slandered the ASBL and its President Lloyd Chapman, and embarked on an aggressive campaign to impugn the organization's credibility with members of the media.— Long Island Business News Products
No thrice-divorced former Oxycontin addict is in a terrific position to impugn anyone's mental balance.— Forbes.com: Digital Rules By Rich Karlgaard
I am certainly not trying to impugn the character of U.S. troops, the vast majority of whom are the pride of our nation, but it cannot be ignored that with lower standards there is a concomitant increase in the incidence of criminal activity -- weapons theft and smuggling included.— Armed and Safe
"Clear images of an armoured policeman assaulting an innocent bystander from behind impugn the whole attitude to policing protests by the Metropolitan Police," said Liberty's Shami Chakrabarti.— EurActiv.com

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a year.
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