Caustic soda : তিক্ত সোডা;
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caustic soda  causticity  chastised  See Words Also In
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
Stare at (চাওয়া বা তাকানো): He stares at me.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
In vogue (চালু): This custom is not in vogue at present.
Out of order (বিকল): The elevator was out of order.
Safe and sound (নিরাপদে)— He reached home safe and sound.