Critical angle : সংকট-কোণ;
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Call for(চাওয়া): I will call for his explanation.
Rule over (শাসন করা): In the absence of the Parliament, the President rules over the country.
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Idioms
Hold water (ধোপে টেকা): This policy will not hold water in this situation.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
Well off (স্বচ্ছল) - Jim and Della were not well off.