Slip of the pen ( লেখায় অসতর্কতাবশতঃ সামান্য ভুল ) This mistake is due to a slip of the pen.
By chance ( দৈবাৎ ) I met him on the way by chance.
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.
Kith and kin ( নিকট আত্মীয় ) He has no good relationship with his kith and kin.
In a nut shell ( খুব সংক্ষেপে ) Tell the story in a nut shell.
At a loss ( হতবু্দ্ধি ; কিংকর্তব্যবিমূঢ় ) He was at a loss and did not know what to do.