Producing the desired result; effective in achieving a particular purpose or goal. It emphasizes successful outcomes and practical effectiveness.
From Latin 'efficacia' meaning 'effectiveness,' derived from 'efficere' (to accomplish). The root 'facere' means 'to make or do,' so efficacious literally means 'making things happen successfully.'
Efficacious sounds fancy, but think 'efficient + spacious' - it has room for success! Unlike just being 'effective,' efficacious implies the method not only works but works really well, like a medicine that doesn't just treat symptoms but cures the disease.
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