Down in the mouth : দৃশ্যত হতাশ বা বিষণ্ণ;
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Fit for (যোগ্য): Sabina is not yet fit for marriage.
Repentant for (অনুতপ্ত): Kamal should be repentant for his misbehavior.
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Idioms
At last (in the end – অবশেষে) He tried hard, and at last, succeeded in achieving his goal.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
From cradle to grave (দোলনা থেকে কবর পর্যন্ত): Everyone has to learn from cradle to grave.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.