no obj.
1- involuntarily open one's mouth wide and inhale deeply due to tiredness or boredom打呵欠, 欠伸：
he began yawning and looking at his watch.
他开始打呵欠, 并看了看手表。
1.1
- usu. as adj. yawning be wide open裂开, 豁开：
a yawning chasm.
一个裂开大口的深沟。
1
- a reflex act of opening one's mouth wide and inhaling deeply due to tiredness or boredom呵欠, 哈欠。
1.1
- informal a thing that is considered boring or tedious〈非正式〉乏味的事：
a long period of your life is a yawn to everyone.
你一生中有很长一段时光对大家而言都是平淡乏味的。
派生词
yawningly
adverb词源
Old English geonian, of Germanic origin， from an Indo-European root shared by Latin hiare and Greek khainein. Current noun senses date from the early 18th cent.