Loosen

1. To free from restraint; to set at liberty..
2. To remove costiveness from; to facilitate or increase the alvine discharges of.
3. 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. To become loose; to become less tight, firm, or compact.