ungird

verb (used with object), un·gird·ed or un·girt, un·gird·ing.

1. to loosen or remove a girdle or belt from.
2. to loosen or remove by unfastening a belt: to ungird a sword.

v.Old English ongyrde, from un- (2) “opposite of” + gird. Cf. Middle Dutch ontgorden, Old High German ingurten, German entgürten. Related: Ungirded; ungirding.