ineffective

[in-i-fek-tiv]
adjective
1.
not effective; not producing results; ineffectual: ineffective efforts; ineffective remedies.
2.
inefficient or incompetent; incapable: an ineffective manager.
3.
lacking in artistic effect, as a literary work, theatrical production, or painting.

Origin:
1645–55; in-3 + effective

ineffectively, adverb
ineffectiveness, noun
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World English Dictionary
ineffective (ˌɪnɪˈfɛktɪv)
 
adj
1.  having no effect
2.  incompetent or inefficient
 
inef'fectively
 
adv
 
inef'fectiveness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
But much education work has been labelled ineffective.
The bomber's intent to die makes deterrents ineffective.
School officials ended the program earlier this year, calling it ineffective.
Nonetheless, her government's response has been criticised as tardy and
  ineffective.
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