efficacious
English · Thesaurus
AI In plain words
Writing a short explanation…
Written by a house AI from the entry below, in your language. The entry itself is the source.
efficacious
- /ˌɛf.ɪˈkeɪ.ʃəs/ UK
- /ˌɛf.əˈkeɪ.ʃəs/ US
- /ˌef.əˈkæɪ.ʃəs/ Australia
Rhymes with -eɪʃəs
Where it comes from
From Old French efficacieux (whence -acious), from Latin efficāx (“efficacious”) + -ous, from efficere (“to effect, to accomplish”); see effect.
adjective more efficacious · most efficacious
-
Effective; possessing efficacy.
This medicine is efficacious.
Similar: effective · Opposite: inefficacious
Translations
Every language
adj effective — see also effective
| Español | efectivo, eficaz, presentáneo |
|---|---|
| 中文 | 有效 yǒuxiào, 管用 guǎnyòng, 奏效 zòuxiào, 靈驗 /灵验 língyàn, 藥效好 /药效好 yàoxiào hǎo, 療效好 /疗效好 liáoxiào hǎo |
| Français | efficace |
| Deutsch | wirksam |
| Русский | де́йственный déjstvennyj, эффекти́вный effektívnyj |
| Tiếng Việt | hữu hiệu, có hiệu lực, ép phê |
Talk about this word "efficacious." Wiktionary, via Micwyn, micwyn.com/word/efficacious. Accessed 5 Nov. 2026. efficacious. (n.d.). In Wiktionary, via Micwyn. Retrieved November 5, 2026, from https://micwyn.com/word/efficacious "efficacious." Wiktionary, via Micwyn. Accessed November 5, 2026. https://micwyn.com/word/efficacious.Cite this
@misc{efficacious_2026,
title = {efficacious},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/efficacious},
urldate = {2026-11-05}
}
