Catoptric : ক্যাটপ্টরিক্;
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Appropriate Prepositions
Conform to (নিয়মনীতি অনুসরণ করা): The employees have to conform to a strict dress code.
Dependent on (নির্ভরশীল): Sepm is dependent on his father.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
Quarrel over (কোন বিষয়ে ঝগড়া করা): Do not quarrel over this trifling matter, let it be drop.
Solution to (সমাধান): None can solution to every problem.
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Idioms
At the top of (শীর্ষে): The boy shouted at the top of his voice.
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Hush money (ঘুষ): He offered a hush money to disclose the file.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.