Wax and wane : উত্থান পতন ঘটা;
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Appropriate Prepositions
Apologize to (ক্ষমা প্রার্থনা করা, দুঃখসহ ত্রুটি স্বীকার করা): The student apologized to the Principal for adopting unfair means in the examination.
Averse to (বিমুখ): Rahim was averse of your various problems.
Bask in(রোদ পোহানো): The boys and girls are basking in the sun right now.
Full of (পরিপূর্ণ): Our Rivers are full of fishes.
Play at (খেলা): I do not play at cards.
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Idioms
Call to mind (স্মরণ করা): I cannot call to mind your cell number.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Without fail (অবশ্যই) - You must attend the meeting without fail.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.