Authenticates : বিশুদ্ধতা প্রমাণ করা;
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Appropriate Prepositions
Addicted to(খারাপ কিছুতে আসক্ত): She is addicted to collecting stamps.
Apology to (কারো কাছে ক্ষমা চাওয়া): Rakib should ask apology to her.
Careless of(অসতর্ক): Do not be careless of your health.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Popte in, to (মার্জিত): We must be popte in our dealings. One should be popte to
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Idioms
At a snail's pace (very slowly – খুব ধীর গতিতে) The economy of Bangladesh is growing at a snail’s pace.
Arm in arm (পরস্পর সম্পর্কিত বিষয়) All good people should live arm in arm with one another.
Bear hard upon (behave rudely-নির্দয়ভাবে ব্যবহার করা - V) Never bear hard upon your servants.
Put up with (সহ্য করা - tolerate): I could not put up with his behavior.
Swan-song (অন্তিম গীত, শেষ কর্ম): This writing is the swan song of Kazi Nazrul islam.