To prevent : আটকান; বিরত করা; বাধা দেত্তয়া; নিবারণ করা; ব্যাহত করা; ঠেকান; প্রতিকর্ম করা; নিরোধ করা;
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Appropriate Prepositions
Annoyed for(কোনো কারনে বিরক্ত হওয়া): The officer was annoyed with the clerk for being late.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Bridge over (সেতু): The only entrance to Allahabad in that direction was by a bridge over the Jumna.
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Stare at (চাওয়া বা তাকানো): He stares at me.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Bad names (গালমন্দ—n) He called the man bad names.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Set free (মুক্ত করা): The prisoners were set free.