Efficacy (noun)
ef-ik-a-see
The ability to produce a desired or intended result.
Early 16th century from Latin efficacia, from efficax, efficac-
Example sentences
“We don’t know much about the efficacy of this method.”
Praetorian (adj) (noun) pri-taw-ree-un of or relating to a praetor (a magistrate in the Roman republic). a soldier of the Praetorian Guard (Roman imperial army) First recorded in 1375–1425; late…
