Respiratory system : শ্বসনতন্ত্র;
Related Words
respiratory quotient  respiratory system  respiratorysystem  See Words Also In
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Appropriate Prepositions
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Conform to (নিয়মনীতি অনুসরণ করা): The employees have to conform to a strict dress code.
Indulge in (আসক্ত): You should not indulge in social media.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
Out of date (সেকেলে): This fashion is out of date.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.