In a hurry( তাড়াহুড়ার মধ্যে ) Don't do the work in a hurry.
In vain( বৃথা ) All his attempts were in vain.
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.
Hard nut to crack( কঠিন সমস্যা ) The problem of adult education is really a hard nut to crack.
A bolt from the blue( সম্পূর্ন অপ্রত্যাশিত ) The news of his father's death came to him as a bolt from the blue.
Cats and dogs( মূষল ধারে ) It was raining cats and dogs.