American English

Definition of unable adjective from the Oxford Advanced American Dictionary

  

unable

 adjective
adjective
NAmE//ʌnˈeɪbl//
 
[not before noun] unable to do something (rather formal)
 
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 not having the skill, strength, time, knowledge, etc. to do something He lay there, unable to move. I tried to contact him but was unable to. She was unable to hide her excitement. Let us know if you're unable to come. They have been unable or unwilling to resolve the conflict. opposite able
See the Oxford Advanced Learner's Dictionary entry: unable