Grey matter : মাথার ঘিলু; মগজ;
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grey matter  ground water  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.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Cruise to (জয় লাভ করা): The Bangladesh team cruised to their fifth successive win this afternoon.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Guard from/against (রক্ষা করা): My parents always guard me from/against bad people.
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Idioms
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.