Linchpin : অপরিহার্য উপাদান; অপরিহার্য অংশ; আসল লোক বা জিনিস; গাড়ির চাকার খিল বা পিন;
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Appropriate Prepositions
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Noted for (বিখ্যাত): She is noted for dancing.
Remedy for (প্রতিকার): There is no remedy for cancer.
Similar to (সদৃশ): My T-shirt is similar to yours.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.