brave (adj.) Look up brave at Dictionary.com
late 15c., from Middle French brave, "splendid, valiant," from Italian bravo "brave, bold," originally "wild, savage," possibly from Medieval Latin bravus "cutthroat, villain," from Latin pravus "crooked, depraved;" a less likely etymology being from Latin barbarus (see barbarous). A Celtic origin (Irish breagh, Cornish bray) also has been suggested.

Old English words for this, some with overtones of "rashness," included modig (now "moody"), beald ("bold"), cene ("keen"), dyrstig ("daring"). Brave new world is from the title of Aldous Huxley's 1932 satirical utopian novel; he lifted the phrase from Shakespeare ("Tempest" v.i.183).
brave (v.) Look up brave at Dictionary.com
"to face with bravery," 1776, from French braver, from brave (see brave (adj.)). Related: Braved; braving.
brave (n.) Look up brave at Dictionary.com
"North American Indian warrior," c.1600, from brave (adj.), and compare bravo.