quit

put an end to a state or an activity; "Quit teasing your little brother"

give up or retire from a position; "The Secretary of the Navy will leave office next month"; "The chairman resigned over the financial scandal"

go away or leave

turn away from; give up; "I am foreswearing women forever"

give up in the face of defeat of lacking hope; admit defeat; "In the second round, the challenger gave up"