By leaps and bounds ( অতি দ্রুতগতিতে ) The population of Bangladesh is increasing by leaps and bounds.
Hush money ( ঘুষ ) He offered a hush money to suppress the murder.
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.
By the by ( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
tickled pink ( খুব খুশি করানো ) She was tickled pink by the good news.
Irony of fate ( ভাগ্যের পরিহাস ) He could not succeed by irony of fate.