Extemporise : পূর্বপ্রস্তুতি ব্যতীত বলা বা বক্তৃতা করা;
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Beg for(অনুরোধ করা): Maria begged the Superintendent for a seat in the school hostel.
Consist of(গঠিত হওয়া): The committee consists of ten members.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
Run after (পশ্চাদানুসরণ করা): Do not run after money.
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Idioms
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Base born (নীচ বংশজাত, খারাপ জাত—adj.) He is a base born person; I cannot go along well with him.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Make hay while sun shines (ঝোপ বুঝে কোপ মারা) You should try to make hay while sun shines.