UNBUCKLE

Source: 566, 567

unbuckle. Unbuckle, v.t. to loose a buckle, set free, ease

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Un‐buc″kle (?), v. t. [[1st pref. un- + buckle.]] To loose the buckles of; to unfasten; as, to unbuckle a shoe. “Unbuckle anon thy purse.” Chaucer.