Definition of loosen
1
: to release from restraint
2
: to make looser
loosened his tie loosen a screw
3
: to relieve (the bowels) of constipation
4
: to cause or permit to become less strict
—often used with up loosened the rules
: to become loose or looser
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Merriam-Webster unabridged
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Time Traveler for loosen
The first known use of loosen was in the 14th century
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