Perpendicularity : লম্বত্ব; উল্লম্বতা;
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Appropriate Prepositions
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Bark at(ঘেউ ঘেউ করা): The dog is barking at the strange woman.
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Contribution to (অবদান): His invention made a major contribution to road safety.
Die for (আত্নত্যাগ করা): Our Chairman died for our country.
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Idioms
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.
To meet trouble half-way (পুরোপুরি মোকাবেলার আগেই হাল ছেড়ে দেয়া): He met trouble half way after getting the instructions.
Without fail (অবশ্যই) - You must attend the meeting without fail.