Correct

熟睡

/ shúshuì / 
Strokes

Definition

asleep/sleeping soundly

Example

As a Verb

sleep soundly/deadly/deeply/heavily; be fast/sound asleep

1
Xīngfèn
兴奋
hěn
很
jiǔ
久
zhīhòu
之后
  
,
háizi
孩子
men
们
shúshuì
熟睡
le
了
  
。

The children fell into a sound sleep after all the excitement.