Efficacy : ফলপ্রসূতা; কার্যক্ষমতা; নিশ্চিত ফলদানের ক্ষমতা;
Related Words
efface  efficacious  efficacy  effigy  See Words Also In
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Appropriate Prepositions
Astonished at(বিস্ময়-বিহবল হওয়া): We were astonished at his unexpected success.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Heir of (উত্তরাধিকারী): He is the heir of his father.
Inquire for (দেখা করতে চাওয়া): He inquires for the manager.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Right and left (এলোপাথাড়ি - indiscriminately): He planted trees right and left.
Worthy of (যোগ্য) - He is worthy of a good job.