Obsolescence : বিলোপপ্রবণতা; পুরান হত্তয়া;
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Capable of(সক্ষম): He is capable of doing it.
Careless of(অসতর্ক): Do not be careless of your health.
Cruise to (জয় লাভ করা): The Bangladesh team cruised to their fifth successive win this afternoon.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Pass sth/sb off as sth/sb (মিথ্যা পরিচয় দেয়া; Pretend – ভান করা): They were trying to pass off these shirts as genuine Armani.