In a sentence
Six example sentences with efficacious, each labelled with its topic.
The older antibiotic remains efficacious against this strain, which is why the ward still stocks it beside newer drugs.
Medicine
Twenty minutes of daylight after waking proved more efficacious than any supplement the participants had tried for winter sleepiness.
Psychology
Salting eggplant for thirty minutes is efficacious against bitterness, and it also keeps the slices from drinking a cup of oil.
Cooking
A small cash transfer proved more efficacious than food aid, since families spent it on whatever they lacked most.
Economics
Planting hedgerows turned out to be efficacious against soil loss, cutting erosion on the test fields by half.
Environment
The most efficacious change was also the simplest: answering every customer email within an hour.
Business
Study efficacious until you keep it
Learn English words in sentences about topics you pick, with a quick quiz. With an account, words come back for review.
Found in these word lists
Found in 4 published word listsRecognized
Each source is a published word list that contains efficacious. No exam board publishes an official GRE, GMAT or SAT list; GMAT words come from GRE lists and the Academic Word List.