Prophylactics : প্রতিষেধক;
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Appropriate Prepositions
Acceptable to(গ্রহণযোগ্য): Such behavior is just not acceptable in this school.
Apology for (কোনো কারনে ক্ষমা চাওয়া): Sajib should ask apology to her of his mistake.
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Bad at (অদক্ষ): He is not bad at English.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
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Idioms
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
In the long run (পরিণামে): You will have to suffer in the long run.
Put the cart before the horse (to reverse the natural order of things-কোনো জিনিসের স্বাভাবিক ক্রমকে পাল্টে দেয়া) - The leader put the cart before the horse.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.