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"; "he apologized for his oscitancy" 口を大きく開けて、無意識のうちに息を吸うこと。通常、疲労か退屈によって引き起こされる。
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