Sharpness : তীক্ষ্ণতা; প্রাখর্য;
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Appropriate Prepositions
Bar to(বাধা): Poverty is not a bar to happiness.
Call for(চাওয়া): I will call for his explanation.
Independent of (স্বাধীন): They are independent of my health.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
Suffer from (অসুখে ভোগা, কষ্ট পাওয়া): He has been suffering from fever for last three days.
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Idioms
Base born (নীচ বংশজাত, খারাপ জাত—adj.) He is a base born person; I cannot go along well with him.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
With a view to (উদ্দেশ্য)- He goes to college with a view to attending the class.