Mental abstraction : চটকা;
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Appropriate Prepositions
Avail (oneself) of(সুযোগের স্বব্যবহার করা): I shall avail myself of the first trip to London tomorrow.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Delegate to (প্রতিনিধি): Nazrul welcomed the delegates to the new conference.
Destitute of (নিঃস্ব; বিবর্জিত): He is destitute of any friend here.
Greed for (লোভ): He has an indomitable greed for wealth.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
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.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.