January 14, 2008
efficacious
(adj.)

having the power to produce a desired effect

Pronunciation:
eff-ih-KAY-shus

In a sentence:
The sisters’ reprimand was efficacious; Rachel left her sorority house in tears, and refused to eat for an entire week.

In a different sentence:
The most efficacious medical cocktail prescribed to Janet was also the most pleasure inducing and life shattering.

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