0 the short, loud sound of something like a stick hitting a surface:
1 to hit something, making a short, loud sound
Invariably, the pupil would rather have the strap—thwack, it was over and done with.
However, one day my wife was standing beside the backdoor of our home when something with a loud thwack hit the wall within an inch of her head.
Everybody heard a sharp "thwack" and knew instantly what it meant.
I plunged into the jungle of that great and wild language, getting thwacked by the branches of word-endings and consonant clusters right and left.
