/ʌnˈbʌtənɪŋ/
She paused, unbuttoning her coat as she stepped inside.
她停了一下,走进屋时解开了外套的纽扣。
Unbuttoning his collar, he finally began to speak honestly about what had happened.
他解开衣领的纽扣,终于开始坦诚地讲述发生了什么。
由前缀 un-(表示“反向、取消”)+ button(纽扣)+ -ing(表示动作/过程)构成。button 源自古法语 bouton,本义与“凸起、芽状物”相关,后来引申为衣物上的“扣子”。
(该词多以 unbutton / unbuttoned / unbuttoning 等词形出现在叙述人物动作与心理放松的场景中)