CSSOUNDa short loud sound like something hitting a hard surface 拍打（声）；重击（声）
—thwack verb [transitiveT]
Examples from the Corpus
thwack• The customary thwack on the bottom is still the best method for determining doneness.• He hit the flaring log such a hefty thwack that it broke in two.• From the next room came the thwack of darts and a louder hubbub of voices.• Rely more on the thwack than the look.• Somebody had procured an aluminum bat, and the traditional thwack surrendered to a whistling hum.