Perpendicularity : লম্বত্ব; উল্লম্বতা;
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Appropriate Prepositions
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Competent for(যোগ্য): He is not competent for the post.
Dwell in (বাস করা): He dwells in a tall apartment.
Grasp at (আঁকড়িয়ে ধরা): He grasped me at my hand.
Play at (খেলা): I do not play at cards.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
In the wake of (ঠিক পরে): Police came in the wake of the accident.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.