Die in harness ( কর্মরত অবস্থায় মারা যাওয়া ) Dr. Sen died in harness.
A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
In time ( ঠিক সময়ে ) He reached the station in time.
By the by ( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
At dagger drawn ( খড়গহস্ত ) The two brothers are now at daggers drawn.
A rainy day ( দুর্দিন ) Everybody should save something for rainy day.