Open English Wordnet
Adjectives
(a)incapable(followed by ‘of’) lacking capacity or ability“incapable of carrying a tune”,
“he is incapable of understanding the matter”,
“incapable of doing the work” (s)incapablenot being susceptible to or admitting of something (usually followed by ‘of’)“incapable of solution” (a)incapable(followed by ‘of’) not having the temperament or inclination for“simply incapable of lying”