Correct

击沉

/ jīchén / 
Strokes

Definition

to attack and sink (a ship)

Example

As a Verb

bombard and sink; send (a ship) to the bottom

1
Zhànjiàn
战舰
bèi
被
jīchén
击沉
le
了
  
。

The warship was bombarded and sunk.

2
Qiántǐng
潜艇
jīchén
击沉
liǎng
两
sōu
艘
díjiàn
敌舰
  
。

The submarine sank two enemy warships.