Definition of unsuitable adjective from the Oxford Advanced American Dictionary

 

unsuitable

 adjective
adjective
NAmE//ʌnˈsut̮əbl//
 
unsuitable (for somebody/something)
 
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not right or appropriate for a particular person, purpose, or occasion He was wearing shoes that were totally unsuitable for climbing. They considered him unsuitable for their daughter. These roads are unsuitable for use by heavy vehicles. opposite suitable
unsuitability
 
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NAmE//ʌnˌsut̮əˈbɪlət̮i//
 
noun [uncountable]
NAmE//ʌnˈsut̮əbli//
 
adverb They were unsuitably dressed for the occasion.
See the Oxford Advanced Learner's Dictionary entry: unsuitable