What is the opposite of ineffectual?

Need antonyms for ineffectual? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of producing no results
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Adjective
Opposite of not producing any significant or desired effect
Adjective
Opposite of excessively sentimental or prim
Adjective
(of a person) Opposite of shy, timid, and quiet
Adjective
Opposite of of very poor quality
Adjective
Opposite of small and weak
Adjective
Opposite of not convincing, plausible or believable
Adjective
Opposite of relating to or resembling farce, especially because of absurd or ridiculous aspects
Adjective
Opposite of lacking in colour, spirit, or vitality
Adjective
Opposite of useless or futile
Adjective
Opposite of affected, over-refined, and ineffectual
Adjective
Opposite of done in an inept or unskilful way
Adjective
Opposite of possessing or acting with the desire to do noble and romantic deeds, without thought of realism and practicality
Adjective
Opposite of weak in intellectual power
Adjective
Opposite of domesticated, compliant
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