Noble

c.1225, "illustrious, distinguished, worthy of honor or respect," from O.Fr. noble, from L. nobilis "well-known, famous, renowned, of superior birth," earlier gnobilis, lit. "knowable," from gnoscere "to come to know," from PIE base *gno- (see know). The prominent Roman families, which were "well known," provided most of the Republic's public officials. Meaning "distinguished by rank, title, or birth" is first recorded 1297. Sense of "having lofty character, having high moral qualities" is from 1601. The noble gases (1902) so called for their inactivity or interness; a use of the word that had been applied in M.E. to precious stones, metals, etc., of similar quality (c.1390), from the sense of "having admirable properties" (c.1305).