Octahedron : অষ্টতলক;
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Appropriate Prepositions
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Antipathy to/towards (ঘৃনা): I have a strong antipathy to smoking.
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Authority over (কর্তৃত্ব, আধিপত্য): She has no authority over his growing daughters.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
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Idioms
Art and part (অভিসন্ধি ও সম্পাদন) We have no art and part in his affairs.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Soft Soap (নিজ অভিপ্রায়ে/অভিসন্ধিতে তোষামোদ করা): He was expert in soft soap.