At one’s own sweet will( খুশি মতো ) He still does it at his own sweet will.
Rank and file( সাধারণ লোক ) We should pay attention to the rank and file of the country.
Man of letters( পন্ডিত লোক ) Sir Ashutosh Mukherjee was a man of letters.
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.
vile sycophant( খঁয়ের খা )
As if( যেন ) He swims so beautifully as if he is the Olympic gold medalist.