incapable incapable /ˌɪnˈkeɪpəbəl/

adjective

1. () (followed by 'of') lacking capacity or ability  ( incapable )
   (followed by 'of') lacking capacity or ability
    Incapable of carrying a tune
   incapable of carrying a tune
    He is incapable of understanding the matter
   he is incapable of understanding the matter
    Incapable of doing the work
   incapable of doing the work
   
2. () Not being susceptible to or admitting of something (usually followed by 'of')  ( incapable )
   not being susceptible to or admitting of something (usually followed by 'of')
    Incapable of solution
   incapable of solution
   
3. Not meeting requirements  ( incapable , incompetent , unequal to )
   not meeting requirements
    Unequal to the demands put upon him
   unequal to the demands put upon him
   
4. (followed by 'of') not having the temperament or inclination for  ( incapable )
   (followed by 'of') not having the temperament or inclination for
    Simply incapable of lying
   simply incapable of lying