On the spur of the moment ( মুহুর্তের উত্তেজনায় ) He did it on the spur of the moment.
By hook or by crook ( যে কোন উপায়ে ) You must do this work by hook or by crook.
A bolt from the blue ( সম্পূর্ন অপ্রত্যাশিত ) The news of his father's death came to him as a bolt from the blue.
On the wane ( হ্রাসমান ) His fame is on the wane now.
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.
