Null and void( বাতিল ) The deed has been null and void now.
In the long run( পরিশেষে ) You will have to suffer in the long run.
At stake( বিপন্ন ) His life is at stake now.
A bed of roses thorns( কন্টকময় জীবন ) Life is nothing but a bed of roses.
At large( স্বাধীন ) The anti-socials are still at large.
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.