Refractoriness : ঠেঁটাম; তাপ রোধক পদার্থ;
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Appropriate Prepositions
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Delegate to (প্রতিনিধি): Nazrul welcomed the delegates to the new conference.
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Search for (সন্ধান করা): The police searched the halls of residence for arms.
Shocked at (মানসিক আঘাতপ্রাপ্ত): Snigdha was terribly shocked at the death of Ratul.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Make both ends meet (আয় ব্যয় মেলানো): I cannot make both ends meet with my small income.
Null and void (বাতিল): The deed has been null and void now.