Loosen

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.