thwack

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

I listened to the thwack of the metal balls. 我听着金属球相撞的声音。

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。