English Dictionary

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efficacious (ˌɛfɪˈkeɪʃəs Pronunciation for efficacious

Definitions

adjective

  1. capable of or successful in producing an intended result; effective as a means, remedy, etc

Derived Forms

ˌeffiˈcaciously adverb

Word Origin

C16: from Latin efficāx powerful, efficient, from efficere to achieve; see effect

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