drowsy

1. ADJ If you feel drowsy, you feel sleepy and cannot think clearly. 昏昏欲睡的

He felt pleasantly drowsy and had to fight off the urge to sleep. 他感觉舒适地昏昏欲睡，不得不击退睡意。

2. drowsinessN-UNCOUNT 睡意

Big meals during the day cause drowsiness. 白天的大餐会让人犯困。