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
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