unbutton

• POS: Verb (usu participle)
• HYPHEN: un=but=ton

CIDE DICTIONARY

unbutton, v. t. [1st pref. un- + button.].

 To loose the buttons of; to unfasten.  [1913 Webster]

OXFORD DICTIONARY

unbutton, v.tr.
1 a unfasten (a coat etc.) by taking the buttons out of the buttonholes. b unbutton the clothes of (a person).
2 (absol.) colloq. relax from tension or formality, become communicative.
3 (as unbuttoned adj.) a not buttoned. b colloq. communicative; informal.

THESAURUS

unbutton

cast off, detach, disengage, doff, free, liberate, loose, loosen, release, remove, take off, unbar, unbind, unbolt, unbuckle, unchain, unclasp, undo, unfasten, unfetter, unglue, unlace, unlatch, unleash, unlock, unloose, unloosen, unstick, unstrap, untie, weigh anchor