To and fro ( এদিন-ওদিক ) Being unable to make up his mind the man is walking to and fro.
Heart and soul ( সর্বান্তঃকরণে ) Try heart and soul and you will succeed.
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.
to the bad ( মন্দাবস্থায় ; ঘাটতি অবস্থায় )
Take to one's heels ( ছুটিয়া পালানো ) The thieves took to their heels to see the police.
Black sheep ( কুলাঙ্গার ) He is a black sheep in his family.