tranquility (noun) - a state of calm and peacefulness; freedom from disturbance or stress
BREAKDOWN: TRAN- (beyond) + QUIL- (calm) + -ITY (state)
tranquil means calm, peaceful, or free from emotional or mental disturbance
to tranquilize means to make calm or sedate; to pacify
a tranquilizer is a drug that induces a sedative or calming effect
“When we are unable to find tranquility within ourselves, it is useless to seek it elsewhere.” —Francois de la Rochefoucauld