Futilitarian : নিরর্থক বা নিষ্ফল প্রয়াসে ব্যস্ত;
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Appropriate Prepositions
Aim at(আঘাত করার জন্য লক্ষ্য স্থির করা): The hunter aimed at the tiger.
Bask in(রোদ পোহানো): The boys and girls are basking in the sun right now.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
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Idioms
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
Cock and bull story (আষাঢ়ে গল্প): You must be ashamed of your cock and bull story.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.
Set free (মুক্ত করা): The prisoners were set free.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.