qīng jìng
peaceful
quiet
tranquil
purified of defiling illusion (Buddhism)
jìng xīn xiū shēn
to have an untroubled heart and behave morally (idiom)
jìng shēn
to purify one's body (i.e. to get castrated)
jìng shēn chū hù
to leave a marriage with nothing (no possessions or property)