Catalysts : অনুঘটক;
Related Words
catalectic  catalysts  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
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Idioms
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.