Lacking the necessary ability; unskilled; incompetent
Not capable of producing a desired effect or result; ineffective.
The definition of ineffectual is not productive or not working correctly.
The definition of feeble is someone who is weak or a half-hearted attempt or something that is faint or unconvincing.
Having no useful result; ineffectual:
Lacking in vigour or expression.
Yielding no worthwhile result; fruitless; unprofitable
(Archaic) Lacking in sense; foolish
Without worth or merit; useless, valueless, etc.
Of evidence, that it is not admissible.
Failing to accomplish an intended objective; fruitless:
Given to doing nothing; lazy.
(Rare) Without fruit.
The definition of impotent is someone or something weak, ineffective or lacking power.
The definition of inadequate is someone or something that is lacking in something desired or required.
Showing a lack of judgment, sense, or reason; inappropriate or foolish:
(Rare) Idle; indolent
Not availing; futile; ineffectual
Void means empty or useless or having no legal force.
To make invalid; deprive of legal force
To cancel out
To vitiate is to corrupt, invalidate or weaken morally.
Producing a strong impression or response; striking:
Not having the desired effect
not producing an intended effect
The definition of unable is a person or thing that doesn't have the ability, power or authority to do something.
(Economics) Adding nothing to exchangeable value.
Find another word for ineffective. In this page you can discover 49 synonyms, antonyms, idiomatic expressions, and related words for ineffective, like: inefficient, flaccid, inefficacious, ineffectual, incapable, bungling, feeble, futile, powerless, feckless and weak.