Dead letter : নির্লক্ষ্য পত্র;
Related Words
dead letter  dead letter office  See Words Also In
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Appropriate Prepositions
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Born of(জন্মগ্রহণ করা): I was born of a middle class family.
Crave for(আকাঙ্ক্ষা করা): Everyone craves for care.
Indebted to (ঋণী থাকা): We are indebted to the great leaders of the country for their service.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
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Idioms
ABC - (প্রাথমিক জ্ঞান): I don't know the ABC of politics.
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.