To the core : সম্পূর্ণভাবে;
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Appropriate Prepositions
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Akin to(সমজাতীয়): These are akin to one another.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Quick at (চটপটে): A cashier must be quick at figures.
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Idioms
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Set something right (ঠিক করা)— He will set the machine right.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.