অ্যাসেটিলীন : উজ্জ্বল আলোকদায়ী জ্বলনশীল গ্যাস-বিশেষ।
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অ্যাসেটিলীন  See Words Also In
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Appropriate Prepositions
Defend against (রক্ষা করা): We will defend our country against all enemies.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Independent of (স্বাধীন): They are independent of my health.
Rebel against (বিদ্রোহ করা): The soldiers rebelled against the king.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.