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Efficacious

adjective
/ɛf.ɪ.ˈkeɪ.ʃəs/
Word Frequency: 1.4

Definitions

1.adjectiveEffective; possessing efficacy.
"This medicine is efficacious."

Synonyms

effectiveeffectualimpressivetellinghard-hittingtrenchantimpellingefficacyeffectivelyeffectivenessefficientlyefficiency

Antonyms

inefficacious

Rhymes With

salaciousaudaciousvivaciousostentatioustenaciousgraciousvexatiousrapacious
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