(1):
(v. i.) To become loose; to become less tight, firm, or compact.
(2):
(v. t.) To remove costiveness from; to facilitate or increase the alvine discharges of.
(3):
(v. t.) To make loose; to free from tightness, tension, firmness, or fixedness; to make less dense or compact; as, to loosen a string, or a knot; to loosen a rock in the earth.
(4):
(v. t.) To free from restraint; to set at liberty..