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efficacious in Spanish

efficacious in Spanish

eficaz
adj
(formal) Effective; possessing efficacy. [from 1520s]
efectivo
adj
(formal) Effective; possessing efficacy. [from 1520s]
presentáneo
adj
(formal) Effective; possessing efficacy. [from 1520s]
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Translations from freedict.org/WikDict, CC BY-SA · example sentences from Tatoeba, CC BY 2.0 FR.