Biquadratic : চতুর্ঘাত;
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Appropriate Prepositions
Bridge over (সেতু): The only entrance to Allahabad in that direction was by a bridge over the Jumna.
Destitute of (নিঃস্ব; বিবর্জিত): He is destitute of any friend here.
Play on (বাজানো): They play on the piano.
Side with (পক্ষ অবলম্বন করা): The Chairman sided with the powerful party.
Wish for (প্রত্যাশা করা): Everybody wish for happiness.
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Idioms
Arm in arm (পরস্পর সম্পর্কিত বিষয়) All good people should live arm in arm with one another.
In the wake of (ঠিক পরে): Police came in the wake of the accident.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.