verb (~ed; ~ing) Date: 14th century transitive verb to release from restraint, to make looser , to relieve (the bowels) of constipation, to cause or permit to become less strict, intransitive verb to become loose or looser
LOOSEN
Meaning of LOOSEN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012