Efficacy : ফলপ্রসূতা; কার্যক্ষমতা; নিশ্চিত ফলদানের ক্ষমতা;
Related Words
efface  efficacious  efficacy  effigy  See Words Also In
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Appropriate Prepositions
Caution against(সাবধান): Take all cautions against the danger.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Long for (আশা করা/কামনা করা): He longed for name and fame.
Rely on (নির্ভর করা): We should not rely on a lazy man.
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Idioms
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.