yawn

/jɔn/

utter a yawn, as from lack of oxygen or when one is tired

中文释义：打哈欠

The lecture was so boring that several students couldn't help yawning.

讲座太无聊，几个学生忍不住打哈欠。

Yawning is often contagious; seeing someone yawn can make you yawn too.

打哈欠常具有传染性；看到别人打哈欠也会让你打哈欠。