বায়ুস্তর: [Noun] Layer of air.
Related Words
বামাস্বর  বায়ুগতি  বায়ুচোষক  বায়ুজীবী  বায়ুবেগে  বায়ুরোধী  বায়ুসেনা  বায়ুসেবন  বায়ুস্তর  বিমুক্তি  বিযুক্তি  See Words Also In
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Breakdown of (বিস্তারিত): Here is statistical breakdown of data.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
In no time (শীঘ্র): He will finish the work in no time.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.