Betatron : বৃত্তাকার পথে ইলেকট্রনের গতিবেগ বৃদ্ধি করার যন্ত্র;
Related Words
bathroom  be torn  betatron  better ment  betterment  bittern  bitterns  See Words Also In
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Appropriate Prepositions
Affectionate to(স্নেহশীল): He is very affectionate to his baby.
Easy of (সরল): The teacher is easy of approach.
Lost in (মগ্ন): Simon is lost in meditation.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
ABC - (প্রাথমিক জ্ঞান): I don't know the ABC of politics.
At a discount (অনাদৃত) Female education is no longer at a discount now.
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.