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ef·fi·ca·cious
 efficacious
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- pronunciation:
- e
f
keI
shihs
- features:
- Word Combinations (adjective)
| part of speech: |
adjective |
| definition: |
causing or capable of causing a desired result; effectual; effective.
The treatment showed signs of being efficacious for this group of patients.- antonyms:
- ineffective, inefficacious
- similar words:
- effective, efficient, fruitful, valid
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| related words: |
active, capable, potent, productive, successful, telling |
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| derivations: |
efficaciously (adv.), efficaciousness (n.) |
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