The absence of mental stress or anxiety.

synonyms: ataraxis, heartsease, peace, peacefulness, repose, serenity.

Roget 831: content, contentment, contentedness; complacency, satisfaction, entire satisfaction, ease, heart's ease, peace of mind; serenity etc. 826; cheerfulness etc. 836; ray of comfort; comfort etc. (well-being) 827.    reconciliation; resignation etc. (patience) 826.    [person who is contented] waiter on Providence.    ... show more

Roget 826: inexcitability^†, imperturbability, inirritability^†; even temper, tranquil mind, dispassion; tolerance, patience, coolth [Coll.].    passiveness etc. (physical inertness) 172; hebetude^†, hebetation^†; impassibility etc. (insensibility) 823; stupefaction.    coolness, calmness etc. adj.; composure, placidity, indisturbance^†, imperturbation^†, sang froid [Fr.], tranquility, serenity; quiet, quietude; peace of mind, mental calmness.    staidness etc. adj.; gravity, sobriety, Quakerism^†; philosophy, equanimity, stoicism, command of temper; self-possession, self-control, self-command, self-restraint, ice water in one's veins; presence of mind.    submission etc. 725; resignation; sufferance, supportance^†, endurance, longsufferance^†, forbearance; longanimity^†; fortitude; patience of Job, patience on a monument" [Twelfth Night], patience 'sovereign o'er transmuted ill'" [Johnson]; moderation; repression of feelings, subjugation of feeling; restraint etc. 751.    tranquillization etc. (moderation) 174^†.    ... show more

Dutch: gemoedsrust, sereniteit, zielenrust
Polish: równowaga, pokój