Preventives : নিবারক বস্তু; প্রতিষেধক ঔষধ;
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Quarrel with (ঝগড়া করা): Some girls quarreled with one another.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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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.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.