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Adjective: unable  ,ún'ey-bul
  1. (usually followed by 'to') not having the necessary means, skill or know-how
    "unable to get to town without a car"; "unable to obtain funds"
  2. (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. Lacking in power or forcefulness
    "like an unable phoenix in hot ashes";
    - ineffective, ineffectual, wet [Brit, informal], useless [informal], pathetic, effete

See also: ability, impotent, incapable

Antonym: able

Encyclopedia: Unable