Null and void( বাতিল ) The deed has been null and void 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.
All but( প্রায় ) The poor villagers are all but ruined.
Tooth and nail( তীব্রভাবে ) He fought tooth and nail against his enemy.
Black sheep( কুলাঙ্গার ) He is a black sheep in his family.
By chance( দৈবাৎ ) I met him on the way by chance.