Upgrade : পদোন্নতি ঘটানো; মেশিন ইত্যাদির উন্নতি ঘটানো;
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Appropriate Prepositions
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Hanker after (আকাঙ্ক্ষা/লোভ করা): He hankers after riches.
Relation with (সম্পর্ক): I have no relation with the culprit.
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Idioms
In vogue (চালু): This custom is not in vogue at present.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Pin money (স্ত্রীর দেয়া হাত খরচ)— She saved her pin money.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.
To the point (সঠিক) - The boy answered the question to the point.