COMPOSURE
composure, calm, calmness, equanimity
(noun) steadiness of mind under stress; “he accepted their problems with composure and she with equanimity”
Source: WordNet® 3.1
Etymology
Noun
composure (countable and uncountable, plural composures)
Calmness of mind or matter, self-possession.
(obsolete) The act of composing, or that which is composed; a composition.
(obsolete) Orderly adjustment; disposition.
(obsolete) Frame; make; temperament.
(obsolete) A combination; a union; a bond.
Synonyms
• (calmness): equanimity
• (calmness): See also calm
Source: Wiktionary
Com*po"sure, n. Etym: [From Compose.]
1. The act of composing, or that which is composed; a composition.
[Obs.]
Signor Pietro, who had an admirable way both of composure [in music]
and teaching. Evelyn.
2. Orderly adjustment; disposition. [Obs.]
Various composures and combinations of these corpuscles. Woodward.
3. Frame; make; temperament. [Obs.]
His composure must be rare indeed Whom these things can not blemish.
Shak.
4. A settled state; calmness; sedateness; tranquillity; repose. "We
seek peace and composure." Milton.
When the passions . . . are all silent, the mind enjoys its most
perfect composure. I. Watts.
5. A combination; a union; a bond. [Obs.] Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition