Slip of the tongue( বলায় সামান্য ভুল ) This is a slip of the tongue, don't lay much stress on it.
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.
In vain( বৃথা ) All his attempts were in vain.
Lion's share( সিংহভাগ ) He took the lion's share of the profit.
Out of doors( বাহিরে ) It is rather cold out of doors.