Diminishing returns : নিমগ্ন আয়;
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Appetite for(ক্ষুধা): He has no appetite for food.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Pleased with (সন্তুষ্ট): Shamim is pleased with all his employees.
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Idioms
At times (মাঝে মাঝে): He at times comes here.
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Of course (অবশ্যই): Of course, you know what that meant.