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.
Tooth and nail ( তীব্রভাবে ) He fought tooth and nail against his enemy.
Hard nut to crack ( কঠিন সমস্যা ) The problem of adult education is really a hard nut to crack.
In full swing ( পুরাদমে ) The school is now in full swing.