Synonyms of loosen in English:

loosen


See definition of loosen

verb

1‘to open it up, you simply loosen two screws’

SYNONYMS
make slack, slacken, slack, unstick
unfasten, detach, release, disconnect, undo, unclasp, unlatch, unbolt
ANTONYMS

tighten

2‘her fingers loosened’

SYNONYMS
become slack, slacken, become loose, let go, unbind, ease
work loose, work free
ANTONYMS

tighten

3‘he had loosened his tie and undone his top button’

SYNONYMS
unfasten, undo, release, unhook, slacken, let out
ANTONYMS

tighten

4‘Philip loosened his grip’

SYNONYMS
weaken, relax, slacken, loose, lessen, reduce, moderate, diminish, soften, alleviate, dilute
ANTONYMS

tighten

5‘you need to loosen up, get rid of some inhibitions’

SYNONYMS
relax, become relaxed, unwind, ease off, ease up, become less rigid
informal let up, hang loose, lighten up, go easy