verbs
make loose or looser
"loosen the tension on a rope"
make less severe or strict
"The government relaxed the curfew after most of the rebels were caught"
become less severe or strict
"The rules relaxed after the new director arrived"
disentangle and raise the fibers of
"tease wool"
cause to become loose
"undo the shoelace"; "untie the knot"; "loosen the necktie"
make less dense
"loosen the soil"
is a type of (narrower)
cause to change; make different; cause a transformation
"The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"
become loose or looser or less tight
"The noose loosened"; "the rope relaxed"