Cotangent : কোণপূরকের স্পর্শরেখা;
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Appropriate Prepositions
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Debar from (বঞ্চিত হওয়া/বাধা দেওয়া): He is debarred from getting a job.
Make of (কোনো উপকরণ দ্বারা সরাসরি তৈরী বোঝাতে): This necklace is made of gold.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
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Idioms
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.