mid-13c., from O.Fr. countenance "demeanor, bearing, conduct," from L. continentia "restraint," lit. "way one contains oneself," from continere (see contain). Meaning evolving M.E. from "appearance" to "facial expression betraying a state of mind," to "face" itself (late
14c.). The verb "to favor, patronize" is from 1560s, from notion of "to look upon with sanction or smiles."