Pertinacity : জেদ,দৃঢ়প্রতিজ্ঞা;
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Appropriate Prepositions
Annoyed for(কোনো কারনে বিরক্ত হওয়া): The officer was annoyed with the clerk for being late.
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
Arm in arm (পরস্পর সম্পর্কিত বিষয়) All good people should live arm in arm with one another.
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Out of order (বিকল): The elevator was out of order.