Wave number : একক দৈর্ঘ্যের অন্তর্গত তরঙ্গসমূহের সংখ্যা;
Related Words
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Appropriate Prepositions
Appear at/in(উপস্থিত হওয়া): I should appear at/in the exam hall in time.
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Run over (চাপা পড়া): The man was run over by a truck.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
Bare word (শুধু মুখের কথা, স্বাক্ষী প্রমানহীন কথা-n) He believed your bare word and now he has been played false with.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.