Antiparticle : বিপরীত কণা; কোনো নির্দিষ্ট মৌলকণার সমভরবিশিষ্ট কিন্তু বিপরীত আধানযুক্ত মৌলকণা;
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Appropriate Prepositions
Affectionate to(স্নেহশীল): He is very affectionate to his baby.
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Care for(গ্রাহ্য করা): I do not care for you.
Cope with(সামলানো বা পেরে উঠা): They cannot cope with the situation.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Without fail (অবশ্যই) - You must attend the meeting without fail.