thwack /θwæk/

• 1. 

  N-COUNT/SOUND A thwack is a sound made when two solid objects hit each other hard. (硬物互相击打发出的)撞击声; 拍打声

  例：

  I listened to the thwack of the metal balls.

  我听着金属球相撞的声音。

  例：

  Then the woodcutter let his axe fly – Thwack! Everyone heard it.

  然后那个伐木工脱手甩出了斧头。哐！的一声，每个人都听见了。