Free of cost : নিখরচা;
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Appropriate Prepositions
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Deal in, with, out (ব্যবসা করা, ব্যবহার করা, বন্টন করা): The man deals in rice. He does not know how to deal with a customer. The Chairman dealt out the relief materials to the flood affected people.
Derive from (উৎসারিত হওয়া): The one has been derived from the poem.
Side with (পক্ষ অবলম্বন করা): The Chairman sided with the powerful party.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.