Definition of unwise adjective from the Oxford Advanced Learner's Dictionary

 

unwise

 adjective
adjective
BrE BrE//ˌʌnˈwaɪz//
 
; NAmE NAmE//ˌʌnˈwaɪz//
 
 
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unwise (to do something) showing a lack of good judgement synonym foolish It would be unwise to comment on the situation without knowing all the facts. an unwise investment I’m afraid I’ve made an unwise decision. opposite wise Word Origin Old English unwīs (see un-, wise).
See the Oxford Advanced American Dictionary entry: unwise