[1] : The Collaborative International Dictionary of English v.0.48

ineffective \in`effect"ive\, a. pref. in- not + effective: cf.
   f. ineffectif.
   not effective; not having the desired effect; ineffectual;
   futile; inefficient; useless; as, an ineffective appeal; an
   ineffective herbal remedy.
   1913 webster +pjc

         the word of god, without the spirit, is a dead and
         ineffective letter.                      --jer. taylor.
   1913 webster

[2] : WordNet (r) 2.0

ineffective
     adj 1: not producing an intended effect; "an ineffective teacher";
            "ineffective legislation" syn: uneffective, ineffectual
            ant: effective
     2: lacking in power or forcefulness; "an ineffectual ruler";
        "like an unable phoenix in hot ashes" syn: ineffectual,
         unable
     3: lacking the ability or skill to perform effectively;
        inadequate; "an ineffective administration"; "inefficient
        workers" syn: inefficient
see also:
uneffective ineffectual effective unable inefficient 

[3] : Moby Thesaurus II by Grady Ward, 1.0

81 moby thesaurus words for "ineffective":
   abortive, aimless, barren, bootless, counterproductive, effete,
   emasculate, empty, etiolated, failed, failing, fatuitous, fatuous,
   featherweight, feckless, forceless, fruitless, futile,
   ill-qualified, impotent, inadequate, inane, incapable,
   incapable of, incompetent, ineffectual, inefficacious, inefficient,
   inept, inferior, inoperative, invalid, invertebrate, lame,
   lightweight, maladjusted, manque, meaningless, miscarried,
   miscarrying, no go, no-account, not equal to, not up to, nugacious,
   nugatory, of no account, of no effect, of no force, of no use,
   pointless, powerless, purposeless, spineless, sterile, stickit,
   stillborn, successless, superfluous, unable, unable to, unadapted,
   unadjusted, unauthoritative, unavailable, unavailing, unendowed,
   unequipped, unfit, unfitted, unfortunate, ungifted, unproductive,
   unqualified, unsuccessful, untalented, useless, vain, weak,
   without any weight, worthless

Ineffective >> I Words
Ineffective, definition of term: Ineffective
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