Coefficient of friction : ঘর্ষণাঙ্ক;
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Appropriate Prepositions
Admit into(প্রবেশ করতে দেওয়া): Only the selected people were admitted into the theater.
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Dwell in (বাস করা): He dwells in a tall apartment.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.
Set something right (ঠিক করা)— He will set the machine right.
Sheet anchor (শেষ আশ্রয়; প্রধান অবলম্বন; আসল খুঁটি)— This small piece of land is his sheet anchor.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.