Catoptric : ক্যাটপ্টরিক্;
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Appropriate Prepositions
Devoted to (মনোযোগী): He is devoted to music.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
Remedy for (প্রতিকার): There is no remedy for cancer.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
Smile on/upon (অনুগ্রহ করা): Fortune smiles on/upon the brave.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
At a discount (অনাদৃত) Female education is no longer at a discount now.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.