Verb
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.
To free from restraint; to set at liberty..
To remove costiveness from; to facilitate or increase the alvine discharges of.
To become loose; to become less tight, firm, or compact.
Source: Webster's dictionarytease wool Source: Internet
The noose loosened Source: Internet
the rope relaxed Source: Internet
loosen the tension on a rope Source: Internet
loosen the soil Source: Internet
undo the shoelace Source: Internet