I. ˈthwak verb
( -ed/-ing/-s )
Etymology: imitative
transitive verb
1.
a.
(1) : to strike with or as if with something flat or heavy : bang , whack
(2) : to beat (a half-dried pantile) into shape
b. : to bring into a specified state by thwacking
to modulate the voice was thwacked into them by a generation of firm-handed mothers — J.H.Wheelwright
2. obsolete : to fill to overflowing : pack
3. : to administer a stinging defeat, punishment, or rebuke to ; also : to satirize severely
intransitive verb
: to strike with a thwack
her head thwacked against the sidewalk — Jonas Bayer
II. noun
( -s )
: a heavy blow with or as if with something flat or heavy : whack
hitting the floor with a thwack — Mary Lasswell
also : the sound of a thwack
the crews worked silently except for the thwack of axhead against trees — R.G.Lillard