名詞 yawning:

1. an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom
   同義詞：yawn, oscitance, oscitancy

動詞 yawn:

1. utter a yawn, as from lack of oxygen or when one is tired
   同義詞：yawn
2. be wide open
   同義詞：gape, yawn, yaw

形容詞 yawning:

1. gaping open as if threatening to engulf someone or something
2. with the mouth wide open indicating boredom or sleepiness
3. showing lack of attention or boredom
   同義詞：drowsy, oscitant

1. An unfathomable chasm; a yawning gulf.
   深淵，無底洞深不可測的裂縫; 張開的深壑
2. His long boring story made me yawn.
   他的冗長的故事聽得我直打呵欠。
3. The act of yawning.
   打哈欠打哈欠的動作

yawn.ing

adj.（形容詞）
Gaping open; cavernous:
裂開的；多洞穴的：
例句：
a yawning abyss.
裂開豁口的深淵

【引伸】
yawn.ingly
adv.（副詞）