By the by ( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
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.
set a naught ( কলা দেখানো )
At home ( দক্ষ ) He is at home in mathematics.
Read between the lines ( তাৎপর্য বোঝা ) Try to read between the lines of the letter.
