Prolongation : দীর্ঘায়তকরণ;
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Appropriate Prepositions
Complain to (কারো কাছে নালিশ করা): You should not complain to his parents.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
Dull of (বধির; কানে শুনে না): He is dull of hearing.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
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Idioms
In vogue (চালু): This custom is not in vogue at present.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.