to work extremely hard
अत्यधिक कठिन काम करना (atyadhik kathin kaam karna)
"He worked his fingers to the bone to build his business."
"उसने अपना व्यवसाय बनाने के लिए बहुत कठिन मेहनत की।" (usne apna vyavsay banane ke liye bahut kathin mehnat ki)
to make others happy by being kind or cheerful
to betray or sacrifice someone to save yourself
A sum of money saved for the future or retirement.
to spend less money due to financial difficulties
To use something to its full potential.
unexpectedly or without warning