Catoptrics : ক্যাটপ্টরিক্স;
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Appropriate Prepositions
By heart (মুখস্থ): Kamal learnt to poem by heart.
Caution against(সাবধান): Take all cautions against the danger.
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Bad names (গালমন্দ—n) He called the man bad names.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.