n.an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom

"he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"

同義詞：yawningoscitanceoscitancy

v.

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

"The child yawned during the long performance"

be wide open

同義詞：gapeyaw

1. She yawned several times during the lecture because it was so boring.
   她在講座中打了好幾次哈欠，因為講座太無聊了。
2. As the movie dragged on, he yawned and checked the time.
   隨著電影的拖延，他打了個哈欠并看了看時間。