At once finger ends( নখদর্পণে ) All these facts are at his finger ends.
On the whole( মোটের উপর ) On the whole, his conduct is good.
By leaps and bounds( অতি দ্রুতগতিতে ) The population of Bangladesh is increasing by leaps and bounds.
Build castles in the air( আকাশ কুসুম চিন্তা করা ) Don't idle away your time in building castles in the air.
breathe out( নিঃশ্বাস ত্যাগ করা ) At last, he breathed his last breath out, and that was the end.
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.