cast off, detach, disengage, doff, free, liberate, loose, loosen, release, remove, take off, unbar, unbind, unbolt, unbridle, unbutton, uncage, unchain, unclasp, undo, unfasten, unfetter, ungag, unglue, unhandcuff, unhobble, unlace, unlash, unlatch, unleash, unlock, unloose, unloosen, unmanacle, unmuzzle, unpen, unpinion, unshackle, unstick, unstrap, untether, untie, untruss, unyoke, weigh anchor

For further exploring for "unbuckle" in Webster Dictionary Online

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range	set searching range	"All Bible", "Old Testament", "New Testament"

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