Rock crystal : স্ফটিকাবিশেষ; একপ্রকার স্বচ্ছ বর্ণহীন স্ফটিক; স্বচ্ছ কোয়ার্টস;
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Appropriate Prepositions
Defend against (রক্ষা করা): We will defend our country against all enemies.
Dressed in (সজ্জিত, পরিহিত): The girl was dressed in silk.
Informed of (অবহিত): I was not informed of your misfortune.
Run on (বিরতিহীন চলা): The bus is running on time.
Work for (কারো জন্য কাজ করা): She works for a construction company.
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Idioms
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.