mature: [15] ‘Earliness’ is the etymological notion underlying the word mature. It goes back ultimately to a pre-Latin base *mātu-, which produced the Latin adjective mātūrus ‘timely, early’, direct source of the English word (in Old French mātūrus became mur ‘ripe’, which played a part in the emergence of English demure). Another Latin derivative of *mātu- was Mātūta, the name of the Roman goddess of the dawn. From this in turn was derived the adjective mātūtīnus ‘of the morning’, source of English matins [13] and matutinal ‘of the morning’ [17]. => demure, matins[mature etymology, mature origin, 英语词源]