"efficacious" in German efficacious wirksam Detailed translations for "efficacious" efficacious efficacious wirksam{adjectiv} If it proves efficacious on me, then I'm to expand treatment to all the LEDA sisters. Source: opensubtitles.org Corpus by OPUS Request review Ja. Wenn er bei mir wirksam ist, kann ich damit alle Ledas behandeln. English synonyms for "efficacious" efficacious {a} effective effectual