Betterment fee : উন্নয়ন দক্ষিণা;
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Devoted to (মনোযোগী): He is devoted to music.
Fed up with (বিরক্ত): He is fed up with waiting for her.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
Cut to the quick (মর্মাহত হওয়া): I was cut to the quick by his birds.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.