PLACIDITY

repose, quiet, placidity, serenity, tranquillity, tranquility

(noun) a disposition free from stress or emotion

placidity, placidness

(noun) a feeling of calmness; a quiet and undisturbed feeling

Source: WordNet® 3.1

Etymology

Noun

placidity (usually uncountable, plural placidities)

The state of being placid; peacefulness.

Synonyms

• (state of being placid): composure, peacefulness, serenity

Source: Wiktionary

Pla*cid"i*ty, n. Etym: [L. placiditas: cf. F. placidité.]

Definition: The quality or state of being placid; calmness; serenity. Hawthorne.

Source: Webster’s Unabridged Dictionary 1913 Edition