loosen
verb(loos-en)
make loose or looser
Examples:
Loosen the tension on a rope. 
loosen
verb(loos-en)
disentangle and raise the fibers of
Synonyms: tease, tease apart, 
 loosen
verb(loos-en)
make less severe or strict
loosen
verb(loos-en)
cause to become loose
Examples:
Loosen the necktie. 
loosen
verb(loos-en)
become loose or looser or less tight
Examples:
The noose loosened. 
loosen
verb(loos-en)
become less severe or strict
loosen
verb(loos-en)
make less dense
Examples:
Loosen the soil.