Effective force : ত্বরণ-বল;
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Appropriate Prepositions
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Curse for (অভিশাপ দেয়া): If he ever mistreats my parents, I will certainly curse him for it.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
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Idioms
Bear (a) grudge (bear hostility to— শত্রুতা বা বিদ্বেষ পোষন করা—V) We should not bear (a) grudge against our brethren.
Cut to the quick (মর্মাহত হওয়া): I was cut to the quick by his birds.
For good (চিরদিনের জন্য): He left the house for good.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.