Now and then( মাঝে মাঝে ) He comes here now and then.
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.
By chance( দৈবাৎ ) I met him on the way by chance.
Red letter day( স্মরণীয় দিন ) The 21 February is a red letter day in the history of Bangladesh.
At a loss( হতবু্দ্ধি ; কিংকর্তব্যবিমূঢ় ) He was at a loss and did not know what to do.
Null and void( বাতিল ) The deed has been null and void now.
