Effectiveness : কার্যকারিতা;
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Appropriate Prepositions
Apathy towards (অনাগ্রহ): The student has great apathy towards his studies.
Attend to(মনোযোগ দেওয়া): Please attend to my advice.
Bar to(বাধা): Poverty is not a bar to happiness.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
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Idioms
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Far and wide (সর্বত্র): His fame spread far and wide.
Take into account (বিবেচনা করা): Your activities should be taken into account.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.