asperse

To sprinkle or scatter (liquid or dust).

a hand in San Marco's font / aspersed him with foul canal water

To falsely or maliciously charge someone.

It hath always been my way to baffle reproach with silence; though I cannot but observe the disingenuous proceedings of this gentleman, who is not content to asperse my writings, but hath wounded, through my sides, those eminent and worthy citizens, Mr. John Morphew, and Mr. Bernard Lintot.

1749, Henry Fielding, The History of Tom Jones, a Foundling, Dublin: John Smith, Volume 2, Book 8, Chapter 8, pp. 126-127, This is indeed a most aggravating Circumstance, which attends unjustly depriving Men of their Reputation; for a Man who is Conscious of having an ill Character, cannot justly be angry with those who neglect and slight him; but ought rather to despise those that affect his Conversation, unless where a perfect Intimacy must have convinced them that their Friend’s Character hath been falsely and injuriously aspersed.