unbutton

动词

1. 1

   解开钮扣、松开扣子

   He unbuttoned his collar and loosened his tie.

   他解开领口的扣子，把领带松开。

2. 2

   扣子松开、解得开指衣物

   This old jacket unbuttons easily at the cuffs.

   这件旧外套袖口的扣子很容易解开。