a marked by qualities giving the power to produce an intended effect
written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley the medicine is efficacious in stopping a cough
a producing or capable of producing an intended result or having a striking effect
an efficacious law
Joe Biden in guardian.co.uk Which borders do we close, do we close the Canadian border too? Do we close flights coming from countries in Europe where it's been identified now? We're told that is not an efficacious use of our effort. We should be focusing on mitigation,...
Bill Clinton in WND.com The anti-abortion conditions "have undermined efforts to promote safe and efficacious family planning programs in foreign nations," Clinton said.