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[syn: ineffective, ineffectual, unable]
The Collaborative International Dictionary of English v.0.48:
Unable \Un*a"ble\, a.
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.
[1913 Webster]
Sapless age and weak unable limbs. --Shak.
[1913 Webster]
WordNet (r) 3.0 (2006):
unable
adj 1: (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" [ant: able]
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; "an ineffectual ruler";
"like an unable phoenix in hot ashes" [syn: ineffective,
ineffectual, unable]