Refractoriness : ঠেঁটাম; তাপ রোধক পদার্থ;
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Appropriate Prepositions
Appointment with (সাক্ষাতের সময়): He has an appointment with the minister at 10:00 am.
Concerned with(জড়িত): She was concerned with such things.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Plead for (ওকালতি করা): He pleads for justice.
Run over (চাপা পড়া): The man was run over by a truck.
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Idioms
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
Lame excuse (বাজে ওজর): The lame excuse will not do.
Make both ends meet (আয় ব্যয় মেলানো): I cannot make both ends meet with my small income.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.