Efficacy

New Word A Day

Efficacy

Pronounced < ef-ah-casey >

It means: Ability to produced an effect.

Daily use: The efficacy of your instructions is good. I now know how to open the file.

Memory trick:

efficacy

effic (reminds of) = effort

acy (reminds of) = acey or an ace (an expert)

effort + ace = the effort makes an ace result

the effort produces an expert result

Listen: Efficacy