Linchpin : অপরিহার্য উপাদান; অপরিহার্য অংশ; আসল লোক বা জিনিস; গাড়ির চাকার খিল বা পিন;
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Appropriate Prepositions
Attention to(মনোযোগ): He has no attention to his studies.
Cast aside (ছুঁড়ে ফেলা): As soon as they become rich they cast aside their poor friends.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Desire for (কামনা): He has no desire for fame.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.