Equi-marginal utility : সমউপান্তিক উপযোগ;
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Appropriate Prepositions
Abound with(ছেয়ে থাকা): They live in a region that abounds with oil.
Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Conceal from(লুকানো) Do not conceal anything from me.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.