In a nut shell( খুব সংক্ষেপে ) Tell the story in a nut shell.
Irony of fate( ভাগ্যের পরিহাস ) He could not succeed by irony of fate.
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.
Hard and fast( বাঁধা ধরা ) There is no such hard and fast rule in this matter.
At one’s wit’s end ( হতবুদ্ধি ) He was at his wit’s end and did not know what to do.
As it were( যেন ) The sun is, as it were , the lamp of the universe.