Antonym of buttoned

Antonyms of verb button

1 of 2 senses of button

Sense 2:

button
Antonym of unbutton (Sense 1)
=>unbutton

Antonyms of adj buttoned

1 sense of buttoned

Sense 1:

buttoned (vs. unbuttoned), fastened

unbuttoned (vs. buttoned), unfastened
open-collared