composture/kəmˈpɒst͡ʃə/EtymologyBorrowed from Middle French composture (“compost”), from late Old French composture, possibly from Latin compositūra, compostūra (“composition”); equivalent to compost + -ure. Compare Portuguese compostura, Spanish compostura.composture means compost, composted manure. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounCompost, composted manure.“The sea's a thief, whose liquid surge resolves The moon into salt tears; the earth's a thief, That feeds and breeds by a composture stolen From general excrement, each thing's a thief.”Composition, makeup, formation.A kind of plaster.