From Longman Dictionary of Contemporary Englishincapablein‧ca‧pa‧ble /ɪnˈkeɪpəbəl/ ●○○ AWL adjective [not before noun]CAN'T not able to do something OPP capableincapable of He seemed incapable of understanding how she felt. Seventy-five percent of the electorate believe his party is incapable of government. The stroke rendered her incapable of speech. —incapability /ɪnˌkeɪpəˈbɪləti/ noun [uncountable]GrammarSomeone is incapable of doing something: He is incapable of lying. ✗Don’t say: He is incapable to lie.
Examples from the Corpusincapable• Utterly without designs, equipment, opportunities, he felt incapable of despair.• Some analysts express concern that the new systems will be less secure and incapable of doing donkey work like batch processing.• Must we then conclude that the Zande are in these terms irrational, incapable of rational, cause-and-effect reasoning?• But it certainly undermines the idea that gay men, as men, are biologically incapable of restraint.• The schools, in fact, seemed almost incapable of self-governance or self-reform.• Marge was incapable of sensing anything, Tom thought.• She was incoherent and incapable of unassisted movement.incapable of• She is an elderly woman who is physically incapable of caring for herself.• The present leaders seem incapable of improving the situation.