Unauthorised : অননুমোদিত; ক্ষমতা অর্পিত হয়নি এমন; অ-স্বীকৃত; অনধিকার; অবৈধ; অননুমত; অনধিকারী;
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Appropriate Prepositions
Abide with(সঙ্গে থাকা): If you would like to rest for a while, you can abide with me.
Attentive to(মনোযোগী): He is attentive to his business.
Change into (পরিবর্তিত হওয়া): At what point does boiling water change into vapor.
Damage to (ক্ষতি): The flood caused much damage to crops last year.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
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Idioms
Follow the footsteps of (পায়ে পায়ে অনুসরণ করা): People always follow the footsteps of some great man.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
Pack up a quarrel (ঝগড়া মিটানো)— He packed up their quarrel.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.