Eagle-eye : তীক্ষ্ণ দৃষ্টি; সতর্কতা;
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Appropriate Prepositions
Angry for (কোন কাজে রাগান্বিত হওয়া): Rahim was angry with me for my having done this.
Apology for (কোনো কারনে ক্ষমা চাওয়া): Sajib should ask apology to her of his mistake.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Senior to (বয়সে বড়): He is senior to me by two years.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
To the point (সঠিক) - The boy answered the question to the point.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.