Resign
Part of speech: verb
Definition: To quit a job or position. To submit; to give up as hopeless or inevitable. To give up; to relinquish ownership of.
Example sentence: I never criticized Modi. All I said was that Modi cannot be a chief minister and still nurse prime ministerial ambitions. I only suggested that he should resign as the chief minister and then stake his claim to be prime minister.
Quit
Part of speech: verb
Definition: To pay (a debt, fine etc.).To repay, pay back (a good deed, injury etc.).To conduct oneself, acquit oneself, to behave (in a specified way).To abandon, renounce (a thing).To leave (a place).To resign from (a job, office, position, etc.).To stop, give up (an activity) (usually + gerund or verbal noun).To close (an application).To pay (a debt, fine etc.).
Example sentence: Suicide is man's way of telling God, 'You can't fire me - I quit.'