Definition of unhinge verb from the Oxford Advanced American Dictionary

 

unhinge

 verb
verb
NAmE//ʌnˈhɪndʒ//
 
[usually passive]unhinge somebody/somethingVerb Forms present simple I / you / we / they unhinge
 
he / she / it unhinges
 
past simple unhinged
 
-ing form unhingeing
 
 
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to make someone very upset or mentally ill She was unhinged by the death of her child and never recovered.
See the Oxford Advanced Learner's Dictionary entry: unhinge