Did you by any chance mean impugn?
Definitions
Century Dictionary and Cyclopedia
Wiktionary
- adj. unpunished
GNU Webster's 1913
- adj. rare Unpunished.
Examples
“Drink wasn't the cause but was used to impune and reproach.”
The Guardian: Hillsborough disaster: MPs debate disclosure of secret documents - as it happened
“So we'll just impune the insurance companies and the health care professionals.”
Obama: 'If you misrepresent what's in the plan, we will call you out'
“I am outraged that the dems would impune this mans charachter by calling him a liar!”
“No sooner did President Obama try to shut you up by revealing his long form birth certificate, than you went on to impune his intelligence!”
The Huffington Post: Bonnie Fuller: Shut Up Donald Trump! Joy Behar Was Right About You
“Is it really necessary to impune his honor, patriotism, and intelligence?”
“It would seem that proves my point - any dissent is disparaged with a quick swipe of integrity having no basis other than to impune and close down any discussion.”
“In saying this, I don't want to impune the integrity of Schwarz.”
“I want to remind you people that we are being monitored by the Ezra Kleins of the world trying to impune the reputation of this blog with calumny and lies since they cant do it any other way.”
“Nobody can impune any aspect of his character, his experience or his skills as a politician under any circumstances, because if they do, they are attacking a black man.”
“You all worship at Vince Cerf who has a clear financial interest in the outcome of this debate but you immediately castigate all of us who disagree and impune our motives.”
Lists
These user-created lists contain the word ‘impune’.
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[Open] Correctly-spelled words that l...
Thanks to everyone who added to this list. (I moved it to a new URL, so all the words added on the first day are credited to me—sorry about that.)
(Here’s the original list with a slo...orignal, refect, collum, lightening, manakin, neumatic, mutch, miosis, radicle, tryptic, kyack, apatite and 119 more...
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Words build meanings from origins( et...
These come from gamma meditation ,I think.
discursive, exogenous, machinations, purportedly, sumptuous, congruity, cantankerous, incongruous, festoon, hessian, ratiocinative, stratigraphic and 2046 more...
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[Open] Frequently confused and misused
Words that are often used to mean something other than what they mean to lexicographers.
apprehensible, immanent, eminent, seamen, venal, venial, brassiere, brassier, brasserie, brazier, brasier, elegy and 38 more...
Tweets
Looking for tweets for impune.

Dan337 “Nemo me impune lacessit” is also the Montrésor family motto in “The Cask of Amontillado”. Here’s a link to a page containing the text of that story, which I include because it also has nice pop-up definitions for less-common words and phrases:
Jan 6, 2011Dan337
It appears (from, e.g., almost every sentence cited on the first page of usage examples for this word*) that almost every person who writes the word “impune” in English intends the word “impugn”.* The only two exceptions use the word in the Latin† motto “Nemo me impune lacessit” (or a fragment thereof).
† That is to say the language of the motto is Latin; it’s the motto of the Order of the Thistle, a chivalric order associated with Scotland.
Jan 6, 2011