Bio chemical : প্রাণরসায়নিক;
Related Words
bio chemical  biochemical  See Words Also In
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Appropriate Prepositions
Cast aside (ছুঁড়ে ফেলা): As soon as they become rich they cast aside their poor friends.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Repent on (নির্ভরশীল): He is repent on his parents.
Run over (চাপা পড়া): The man was run over by a truck.
Smile on/upon (অনুগ্রহ করা): Fortune smiles on/upon the brave.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.