Semi-circular : অর্ধবৃত্তাকার;
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semi-circular  semicircular  See Words Also In
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Appropriate Prepositions
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Certain of(নিশ্চিত): Jamal is certain of his success.
Consent to(মত দেওয়া): My father did not consent to the proposal of my sister’s marriage.
Penalty for, with (দণ্ড, জরিমানা): She has paid the penalty for the misuse of power with two years in prison.
Play on (বাজানো): They play on the piano.
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Idioms
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
In no time (শীঘ্র): He will finish the work in no time.
In the long run (পরিণামে): You will have to suffer in the long run.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.