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v. Present participle of calumniate.

"Polk replied “in a stern manner” that Buchanan would have to judge his own behavior but “it presented a very singular appearance that a member of my Cabinet should be holding familiar intercourse with an unprincipled newspaper letter-writer who was in the daily habit of calumniating and abusing me.”"

calumniated    calumniates    calumniating   

accuse    charge   

libel    drag through the mud    malign    assassinate    badmouth   

calumniated    calumniating   

slander    libel    defame