YAWN

I. verb Etymology: Middle English yenen, yanen, from Old English ginian; akin to Old High German ginēn to ~, Latin hiare, Greek chainein Date: before 12th century intransitive verb to open wide ; gape , to open the mouth wide and take a deep breath usually as an involuntary reaction to fatigue or boredom, transitive verb to utter with a ~, to accomplish with or impel by ~s , II. noun Date: 1602 gap , cavity , an opening of the mouth wide while taking a deep breath often as an involuntary reaction to fatigue or boredom, bore V