Percussion cap : টোটা; ক্যাপ; অল্পপরিমাণ বারুদ যা সত্যিকারের বা খেলনা বন্দুকে বিস্ফোরক হিসেবে ব্যবহৃত হয়;
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Quick at (চটপটে): A cashier must be quick at figures.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
In no time (শীঘ্র): He will finish the work in no time.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.