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

 

unsuitable

 adjective
adjective
BrE BrE//ʌnˈsuːtəbl//
 
, also BrE//ʌnˈsjuːtəbl//
 
; NAmE NAmE//ʌnˈsuːtəbl//
 
 
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unsuitable (for somebody/something) not right or appropriate for a particular person, purpose or occasion He was wearing shoes that were totally unsuitable for climbing. They considered him quite unsuitable for their daughter. These roads are unsuitable for use by heavy vehicles. The huge proportions of the main rooms made the house unsuitable for conversion into flats. opposite suitable
See the Oxford Advanced American Dictionary entry: unsuitable