efficacy - Dictionary definition and meaning for word efficacy
effic(EFFICIENT)+AC(Y)..so just check out if your AC has the efficiency to PRODUCE DESIRED cooling .
efficient+accuracy = efficacy;if sth is efficient and accurate,it does produce desire result
efficacy==> efficiency :))
efficacy resmebles or reminds us of the popular word delicacy.A delicacy has a power to produce any desired effects wen u treat them to ur girlfrnd...lol..!!