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efficacious

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌɛfɪˈkeɪʃəs/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˌɛfɪˈkeɪʃəs/ ,USA pronunciation: respelling(ef′i kā′shəs)

ef•fi•ca•cious /ˌɛfɪˈkeɪʃəs/USA pronunciation adj.

capable of having the desired result or effect;
effective.

See -fec-.

ef•fi•ca•cious (ef′i kā′shəs),USA pronunciation adj.

capable of having the desired result or effect;
effective as a means, measure, remedy, etc.:The medicine is efficacious in stopping a cough.

Latin efficāci- (stem of efficāx) effectual. See efficient, -acious
1520–30

ef′fi•ca′cious•ly, adv.
ef′fi•ca′cious•ness, n.

Collins Concise English Dictionary © HarperCollins Publishers::

efficacious /ˌɛfɪˈkeɪʃəs/ adj

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

Etymology: 16th Century: from Latin efficāx powerful, efficient, from efficere to achieve; see effect

'efficacious' also found in these entries (note: many are not synonyms or translations):

Kumbh Mela - pipsissewa - antifebrile - antiscorbutic - available - effective - efficacy - force - inefficacious - operate - operative - powerful - prevalent - useful - sovereign

Synonyms: effective, effectual, efficient, productive, useful, more...

🗣️Forum discussions with the word(s) "efficacious" in the title:

a sign of an inward grace; efficacious signs of grace
agent sure to be efficacious
efficient - effective - efficacious

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⇱ efficacious - WordReference.com Dictionary of English

efficacious