efficacious

Fetched 2026-10-26 (cache).

Synonyms: efficacies, inefficacious

Antonyms: efficacies, inefficacious

Related words from Datamuse; suggestions, not definitions.

Adjective

1. {{lb|en|formal}} [[effective|Effective]]; possessing [[efficacy]]. {{defdate|from 1520s}}

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.