Materia medica : ব্যবহারিক ঔষধবিজ্ঞান; যে সব দ্রব্য ঔষধরূপে ব্যবহৃত হয়;
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Appropriate Prepositions
Ashamed of(লজ্জিত): Nandini was ashamed of his wrong-doing.
Authority over (কর্তৃত্ব, আধিপত্য): She has no authority over his growing daughters.
Destitute of (নিঃস্ব; বিবর্জিত): He is destitute of any friend here.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Crying need (জরুরী): Mass education is a crying need for India.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
Lump sum (এক কালীন) — He gave us lump sum money.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.