资料来源 : pyDict

解开…的钮扣解开钮扣

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Unbutton \Un*but"ton\, v. t. [1st pref. un- + button.]
   To loose the buttons of; to unfasten.

资料来源 : WordNet®

unbutton
     v : undo the buttons of; "unbutton the shirt" [ant: {button}]