Unbolt : খিল খোলা, খোলা, বন্ধনমুক্ত করা;
Related Words
un fold  unboiled  unbolt  unbolted  unfelt  unfold  unfolds  unpolluted  See Words Also In
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Appropriate Prepositions
Antipathy to/towards (ঘৃনা): I have a strong antipathy to smoking.
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Contribution to (অবদান): His invention made a major contribution to road safety.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
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Idioms
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Up-to-date (আধুনিক) - Now-a-days ladies are very up to date.