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From a variant (influenced by whack) of Middle English thakken (to stroke), from Old English þaccian (to touch gently, stroke, tap), from Proto-Germanic *þakwōną (to touch lightly), from Proto-Indo-European *tag-, *taǵ- (to touch). Cognate with Old Dutch þakolōn (to stroke), Old Norse þykkr (a thwack, thump, blow), Icelandic þjökka, þjaka (to thwack, thump, beat), Norwegian tjåka (to strike, beat), Latin tangō (touch). More at tangent.



thwack (plural thwacks)

  1. The act of thwacking; a strike or blow, especially with a flat implement.
  2. A heavy slapping sound.


thwack (third-person singular simple present thwacks, present participle thwacking, simple past and past participle thwacked)

  1. To whack or hit with a flat implement.
    • Washington Irving
      a distant thwacking sound
  2. To beat.
  3. To fill to overflow.
    (Can we find and add a quotation of Stanyhurst to this entry?)