unable

[ uhn-ey-buh l ]
/ ʌnˈeɪ bəl /

adjective

lacking the necessary power, competence, etc., to accomplish some specified act: He was unable to swim.

Origin of unable

Middle English word dating back to 1350–1400; see origin at un-1, able

Example sentences from the Web for unable

British Dictionary definitions for unable

unable
/ (ʌnˈeɪbəl) /

adjective

(postpositive foll by to) lacking the necessary power, ability, or authority (to do something); not able
archaic incompetent