At bay ( কোনঠাসা ) The tiger was at bay in the bush.
At once back and call ( বাধ্য ) He is always at my back and call.
Fish out of water ( অস্বস্তিকর অবস্থায় ) When he came to the village, he felt like a fish out of water.
A bed of roses thorns ( কন্টকময় জীবন ) Life is nothing but a bed of roses.
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.
At large ( স্বাধীন ) The anti-socials are still at large.