A rainy day ( দুর্দিন ) Everybody should save something for rainy day.
In vain ( বৃথা ) All his attempts were in vain.
Bring to book ( শাস্তি দেওয়া ) He should be brought to book for his misconduct.
Fight shy ( এড়িয়ে চলা ) Why do you fight shy of your teacher.
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.
