At one’s wit’s end ( হতবুদ্ধি ) He was at his wit’s end and did not know what to do.
put a spoke to ones wheel( কারও উন্নতিতে বাধা হওয়া )
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.
Lion's share( সিংহভাগ ) He took the lion's share of the profit.
As if( যেন ) He swims so beautifully as if he is the Olympic gold medalist.
A slow coach( কর্মকুণ্ঠ ও মন্থর ব্যাক্তি ) Roky is known as a slow coach to his friend circle.