Rock-ribbed : অনমনীয়;
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Appropriate Prepositions
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
By heart (মুখস্থ): Kamal learnt to poem by heart.
Fatigued by (ক্লান্ত): He was fatigued by hard work.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
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Idioms
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Turn a deaf ear to (pay no attention, প্রত্যাখান করা) —He turned a deaf ear to my proposal.
Worthy of (যোগ্য) - He is worthy of a good job.