Bosom friend ( অন্তরঙ্গ বন্ধু ) Rifat is my bosom friend.
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.
As if ( যেন ) He swims so beautifully as if he is the Olympic gold medalist.
At home ( দক্ষ ) He is at home in mathematics.
Come off with flying colours ( জয়লাভ করা ) Our School team came off with flying colours.
By fits and starts ( অনিয়মিত ; মাঝে মাঝে ) He works by fits and starts.