vt to free from restraint; to set at liberty.
2. loosen ·vi to become loose; to become less tight, firm, or compact.
3. loosen ·vt to remove costiveness from; to facilitate or increase the alvine discharges of.
4. loosen ·vt 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.