Cryptography : সংকেতলিপি রচনার বিদ্যা;
Related Words
cryptograph  cryptographer  cryptography  See Words Also In
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Appropriate Prepositions
Close to(নিকটে): Our College is close to the Post Office.
Conform to (নিয়মনীতি অনুসরণ করা): The employees have to conform to a strict dress code.
Decide upon (সিদ্ধান্ত করা): We have not yet decided whether we are going to picnic.
Hope for (আশা করা): Let us hope for the best.
Sad at (দুঃখিত): All his colleagues were very sad at his transfer from this place.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.