en·no·ble 
(ĕn-nōbəl)
(ĕn-nōbəl)tr.v. en·no·bled, en·no·bling, en·no·bles
1. To make noble: "that chastity of honor ... which ennobled whatever it touched, and under which vice itself lost half its evil" (Edmund Burke).
2. To confer nobility upon: ennoble a prime minister for distinguished service.
[Middle English *ennoblen, from Old French ennoblir : en-, causative pref.; see EN-1 + noble, noble; see NOBLE.]
en·noble·ment n.
en·nobler n.