Dear sir : প্রিয় মহোদয়;
Related Words
dear sir  derisory  See Words Also In
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Appropriate Prepositions
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Indebted to (ঋণী থাকা): We are indebted to the great leaders of the country for their service.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
Bare word (শুধু মুখের কথা, স্বাক্ষী প্রমানহীন কথা-n) He believed your bare word and now he has been played false with.
For good (চিরদিনের জন্য): He left the house for good.
Out of date (সেকেলে): This fashion is out of date.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.