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Noun: thwack  thwak
  1. A hard blow with a flat object
    "The thwack of the cricket bat against the ball was satisfying"
Verb: thwack  thwak
  1. Deliver a hard blow to
    "The teacher thwacked the student who had misbehaved";
    - smack

Derived forms: thwacks, thwacking, thwacked

Type of: blow, hit

Encyclopedia: Thwack