Efficacy : ফলপ্রসূতা; কার্যক্ষমতা; নিশ্চিত ফলদানের ক্ষমতা;
Related Words
efface  efficacious  efficacy  effigy  See Words Also In
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Appropriate Prepositions
Arrive at(উপস্থিত হওয়া, পৌছানো): The train arrived at Dhaka station on time.
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Long for (আশা করা/কামনা করা): He longed for name and fame.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.