ineffective

Adjective
  1. Not producing an intended effect (synset 300839148)
    "an ineffective teacher"; "ineffective legislation"
    also:
    • idle - not in action or at work
    • inefficacious - lacking the power to produce a desired effect
    • inefficient - not producing desired results; wasteful
    • powerless - lacking power
    • useless - having no beneficial use or incapable of functioning usefully
    tells us about: effectiveness, effectivity, effectuality, effectualness - power to be effective; the quality of being able to bring about an effect
    similar to:
    same as: ineffectual, uneffective
  2. Lacking in power or forcefulness (synset 301830798)
    "an ineffectual ruler"; "like an unable phoenix in hot ashes"
    similar to: impotent - lacking power or ability
    same as: ineffectual, unable
  3. Lacking the ability or skill to perform effectively;
    Inadequate (synset 300513664)
    "an ineffective administration"; "inefficient workers"
    similar to: incompetent - not qualified or suited for a purpose
    same as: inefficient

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