Definition of unwonted adjective from the Oxford Advanced American Dictionary

 

unwonted

 adjective
adjective
NAmE//ʌnˈwɔntəd//
 
, NAmE//ʌnˈwɑntəd//
 
, NAmE//ʌnˈwoʊntəd//
 
(formal)
 
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not usual or expected He spoke with unwonted enthusiasm.
See the Oxford Advanced Learner's Dictionary entry: unwonted