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yawn
intransitive verb
- to open the mouth wide, esp. involuntarily, and breathe in deeply, as a result of fatigue, drowsiness, or boredom
- to be or become wide open; gape: a yawning chasm
transitive verb
to express or utter with a yawn
noun
- an act of yawning or opening wide
- a wide opening; chasm
See yawn in American Heritage Dictionary 4
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