In a fix ( মুশকিলে পতিত ) He is in a fix and does not know what to do.
At home ( দক্ষ ) He is at home in mathematics.
From A to Z ( প্রথম হইতে শেষ পয্র্ন্ত ) The statement is true from A to Z.
At once back and call ( বাধ্য ) He is always at my back and call.
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 and large ( প্রধানতঃ ) People in our village are by and large farmers.