Penetrating : তীক্ষ্ন, তীক্ষ্ণবুদ্ধি;
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penetrating  penetrations  See Words Also In
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Appropriate Prepositions
Congenial to(উপযোগী): The atmosphere is congenial to your health.
Convinced of (আশ্বস্ত): You are convinced of his product.
Independent of (স্বাধীন): They are independent of my health.
Indulge in (প্রশ্রয় দেওয়া): You should not indulge in idleness.
Make up of (গঠিত): Village is made up of many homes.
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Idioms
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.
Run short (কমতি পড়া) —I ran short of money.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.