Efficacy : ফলপ্রসূতা; কার্যক্ষমতা; নিশ্চিত ফলদানের ক্ষমতা;
Related Words
efface  efficacious  efficacy  effigy  See Words Also In
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Appropriate Prepositions
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Quarrel with (ঝগড়া করা): Some girls quarreled with one another.
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Idioms
Call in question (সন্দেহ করা): No one can call his honesty in question.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.