Supererogation : প্রয়োজনাধিক করা;
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supererogation  superstition  superstitions  See Words Also In
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Appropriate Prepositions
Adequate to(সমানুপাতিক): The salary, he gets, is not adequate to the volume of work he has to do.
Appeal to, for(কোন ব্যক্তির কাছে কোন কিছুর জন্য আবেদন করা): The flood affected people appealed to the President for reef.
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
By heart (মুখস্থ): Kamal learnt to poem by heart.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
At times (মাঝে মাঝে): He at times comes here.
Base born (নীচ বংশজাত, খারাপ জাত—adj.) He is a base born person; I cannot go along well with him.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.