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inefficacious

DEFINITIONS OF: inefficacious

1

adj lacking the power to produce a desired effect

“laws that are inefficacious in stopping crime”
Synonyms
ineffective, ineffectual, uneffective
not producing an intended effect
Antonyms:
efficacious
marked by qualities giving the power to produce an intended effect
effective, effectual, efficacious
producing or capable of producing an intended result or having a striking effect
effective
works well as a means or remedy
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