calumniate

• Our Lord prepared his own for the inevitable times when those who would defame, calumniate, or undermine their apostolic work would not be pagans or enemies of Christ, but brothers in the Faith who would think that with these actions they would be doing —  Happy Catholic
• The diplomats in England may resort to this same mode of proceeding to injure people, to calumniate, and to convey to your knowledge such things as they may hope to have the effect of injuring some people they may fear_, in your eyes. —  The Letters of Queen Victoria, Volume 1 (of 3), 1837-1843) A Selection from Her Majesty's Correspondence Between the Years 1837 and 1861
• Do they not, whenever they speak, vilify, calumniate, and abuse all whom they believe to be blameless? —  The Works of Guy de Maupassant, Volume VIII.
• The slogan of unrighteousness is: "Calumniate, calumniate, some of it will stick!" —  Explanation of Catholic Morals A Concise, Reasoned, and Popular Exposition of Catholic Morals
• The old saying, "Calumniate, calumniate, something will always remain after it," was never truer than in the case of this eminent statesman It took some time for matters to be put on a sound footing, and before this actually occurred many mistakes had been made, neither easy to rectify nor possible to explain. —  Cecil Rhodes Man and Empire-Maker

Roget's II: The New Thesaurus

Allen's Synonyms and Antonyms