打瞌睡

打瞌睡	dǎ kē shuì	to doze; to nod off
打	dá	(loanword) dozen / Taiwan pr. [da3]
打	dǎ	to hit; to strike / to fight / (in many expressions) a semantically light transitive verb used with various objects to form expressions with a wide range of meanings, e.g. 打伞 "to hold an umbrella", 打电话 "to make a phone call", 打针 "to get an injection" / (coll.) from; since
瞌	kē	used in 瞌睡
瞌睡	kē shuì	drowsy / to doze / to nap
睡	shuì	to sleep / to lie down