Semicircles : অর্ধবৃত্ত;
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Appropriate Prepositions
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Regret for (দুঃখ করা): We regretted for his failure.
Substitute for (বদলে দেওয়া): This action is substitute for that.
Taste of (স্বাদ; অভিজ্ঞতা): They have had some taste of problems.
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Idioms
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.
To the point (সঠিক) - The boy answered the question to the point.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.