Antonyms of adj ineffectual

3 senses of ineffectual

Sense 1
ineffective (vs. effective), uneffective, ineffectual -- (not producing an intended effect; "an ineffective teacher"; "ineffective legislation")


Sense 2
futile, ineffectual, otiose, unavailing -- (producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt")

INDIRECT (VIA useless) -> useful, utile -- (being of use or service; "the girl felt motherly and useful"; "a useful job"; "a useful member of society")

Sense 3
ineffective, ineffectual, unable -- (lacking in power or forcefulness; "an ineffectual ruler"; "like an unable phoenix in hot ashes")

INDIRECT (VIA impotent) -> potent, strong, stiff -- (having a strong physiological or chemical effect; "a potent toxin"; "potent liquor"; "a potent cup of tea", "a stiff drink")

Similarity of adj ineffectual

3 senses of ineffectual

Sense 1
ineffective (vs. effective), uneffective, ineffectual -- (not producing an intended effect; "an ineffective teacher"; "ineffective legislation")
       => toothless -- (lacking necessary force for effectiveness; "a toothless piece of legislation")
       => unproductive -- (not producing desired results; "the talks between labor and management were unproductive")
          Also See-> idle#1; inefficacious#1; inefficient#1; powerless#1; useless#1

Sense 2
futile, ineffectual, otiose, unavailing -- (producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt")
       => useless (vs. useful) -- (having no beneficial use or incapable of functioning usefully; "a kitchen full of useless gadgets"; "she is useless in an emergency")

Sense 3
ineffective, ineffectual, unable -- (lacking in power or forcefulness; "an ineffectual ruler"; "like an unable phoenix in hot ashes")
       => impotent (vs. potent) -- (lacking power or ability; "Technology without morality is barbarous; morality without technology is impotent"- Freeman J.Dyson; "felt impotent rage")

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