By the by( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
Call in question( সন্দেহ করা ) No one can call his honesty in question.
Catch red handed( হাতে নাতে ধরা ) The thief was caught red handed.
In the nick of time( ঠিক সময়ে ) The school team arrived in the nick of time.
Apple of discord( বিবাদেয় বিষয় ) The paternal property has become an apple of discord between the two brothers.
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.