unable Meaning, Definition & Usage

  1. adjective (usually followed by `to') not having the necessary means or skill or know-how
    • unable to get to town without a car
    • unable to obtain funds
  2. adjective satellite (usually followed by `to') lacking necessary physical or mental ability
    • dyslexics are unable to learn to read adequately
    • the sun was unable to melt enough snow
  3. adjective satellite lacking in power or forcefulness
    ineffective; ineffectual.
    • an ineffectual ruler
    • like an unable phoenix in hot ashes

WordNet

Un*a"ble adjective
Definitions
  1. Not able; not having sufficient strength, means, knowledge, skill, or the like; impotent' weak; helpless; incapable; -- now usually followed by an infinitive or an adverbial phrase; as, unable for work; unable to bear fatigue.
    Sapless age and weak unable limbs. Shak.

Webster 1913