At bay ( কোনঠাসা ) The tiger was at bay in the bush.
Lame excuse ( বাজে গুজব ) This lame excuse will to do.
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.
In the nick of time ( ঠিক সময়ে ) The school team arrived in the nick of time.
Part and parcel ( অবিচ্ছেদ্য অংশ ) Discipline is part and parcel of administration.
A rainy day ( দুর্দিন ) Everybody should save something for rainy day.