
动词,意为解开(纽扣);把……的扣子解开。引申义为放松、敞开心扉。
/nbt.n/
He unbuttoned his coat and sat down by the fire.
他解开外套的扣子,在火炉旁坐了下来。
After a few glasses of wine, she finally unbuttoned and told us what was really on her mind.
喝了几杯酒之后,她终于敞开心扉,告诉了我们她真正在想什么。
由前缀 un-(表示"解除、取消")加上 button(纽扣)构成,字面意思就是"解开纽扣"。button 一词源自古法语 bouton,原义为"芽、圆形突起物",后来引申为衣服上的扣子。该词最早出现于16世纪,后来逐渐发展出"放松、不拘束"的比喻义。