An unintentional opining of the jaws, as from sleepiness.

打呵欠。

A tiresome thing or person; a bore.

惹人厌烦的人(物)。

An opining ; open space; chasm.

缺口；大裂口。

To open the mouth wide, as from hunger, surprise, or bewilderment.

张口(因饥饿、惊奇、困惑所致)。

To open the mouth as wide as possible while inhaling deeply, as from drowsiness.

打呵欠。

To open wide.

裂开。