This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. To separate the connected parts of.

verb-intransitive. To become loosened or separated.

v. To loose; to unfix; to unbind; to untie; figuratively, to detach from any connecting link or agency; to disconnect.

v. To come untied or unloosed.

v. To loose; to unfix; to unbind; to untie.

To loose; unfix; unbind; untie; figuratively, to detach from any connecting link or agency; disconnect.

To come untied or unloosed.

v. cause to become undone

v. become undone or untied

"One of the Indians stepped up and proceeded to unfasten his pack-straps."

fasten    zip    button up    button    tie up    zip up    do up   

unfastened    unfastening    unfastens   

open    open up   

loose    unfix    unbind    untie    unloose    loosen    unloosen    unscrew    unhitch    unhasp   

cutaway    kerseymere    calfskin    silver-laced    hand-knitted    well-starched    unlabelled    black-and-yellow    single-breasted    deep-cut