Definition of unloose verb from the Oxford Advanced American Dictionary

 

unloose

 verb
verb
NAmE//ʌnˈlus//
 
(also unloosen
NAmE//ʌnˈlusn//
 
)
unloose something(old-fashioned or formal)Verb Forms present simple I / you / we / they unloose
 
he / she / it unlooses
 
past simple unloosed
 
-ing form unloosing
 
 
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to make something loose He unloosed his tie.
See the Oxford Advanced Learner's Dictionary entry: unloose