Carboniferous : অঙ্গার-সমৃদ্ধ; অঙ্গারোত্পাদক; কয়লা-উত্পাদক;
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Appropriate Prepositions
Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Die of (রোগে মরা): Many people died of cholera.
Look up (ডিকশনারি থেকে শব্দার্থ খোঁজা): He is looking up a new word meaning from dictionary.
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Idioms
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Null and void (বাতিল): The deed has been null and void now.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.