sink

我妈妈正在厨房的水槽里洗碗。

My mum is washing dishes in the kitchen ___sink.

浴室的水槽堵住了，水流不下去。

The bathroom ___sink is blocked, and the water won't go down.

船撞上冰山后开始下沉。

The ship started to ___sink after hitting the iceberg.