Refractive index : প্রতিসরাঙ্ক;
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Appropriate Prepositions
Abhorrence of (ঘৃণা): Everyone should have abhorrence of a par.
Cause for (চিন্তিত হওয়ার কারণ): He has never given me any cause for concern.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Hatred for (ঘৃণা): I have no hatred for anyone.
Inquire of, about, into, after (অনুসন্ধান করা): Roma inquired of me about my father’s health. The pope will inquire into the cause of fire. Mehjabin inquired after her friends.
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Idioms
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
Hue and cry (শোরগোল): The villagers raised a hue and cry to see the thief.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
To the point (সঠিক) - The boy answered the question to the point.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.