faceyoudaoicibaDictYouDict[face 词源字典]
face: [13] The notion that a person’s face ‘is’ their appearance, what they look like to the rest of the world, lies behind the word face. It probably comes from a prehistoric base *fac-, signifying ‘appear’. This gave rise to Latin faciēs, which originally meant ‘appearance, aspect, form’, and only secondarily, by figurative extension, ‘face’. In due course it passed via Vulgar Latin *facia into Old French as face, from which English acquired it (French, incidentally, dropped the sense ‘face’ in the 17th century, although the word face is retained for ‘front, aspect’, etc).

Related forms in English include facade [17], facet [17] (originally a diminutive), superficial and surface.
=> facade, facet, superficial, surface[face etymology, face origin, 英语词源]
face (n.)youdaoicibaDictYouDict
c. 1300, "the human face, a face; facial appearance or expression; likeness, image," from Old French face "face, countenance, look, appearance" (12c.), from Vulgar Latin *facia (source also of Italian faccia), from Latin facies "appearance, form, figure," and secondarily "visage, countenance," which probably is literally "form imposed on something" and related to facere "to make" (see factitious).

Replaced Old English andwlita "face, countenance" (from root of wlitan "to see, look") and ansyn, ansien, the usual word (from the root of seon "see"). Words for "face" in Indo-European commonly are based on the notion of "appearance, look," and are mostly derivatives from verbs for "to see, look" (as with the Old English words, Greek prosopon, literally "toward-look," Lithuanian veidas, from root *weid- "to see," etc.). But in some cases, as here, the word for "face" means "form, shape." In French, the use of face for "front of the head" was given up 17c. and replaced by visage (older vis), from Latin visus "sight."

From late 14c. as "outward appearance (as contrasted to some other reality);" also from late 14c. as "forward part or front of anything;" also "surface (of the earth or sea), extent (of a city)." Typographical sense of "part of the type which forms the letter" is from 1680s.
Whan she cometh hoom, she raumpeth in my face And crieth 'false coward.' [Chaucer, "Monk's Tale"]
Face to face is from mid-14c. Face time is attested from 1990. To lose face (1876), is said to be from Chinese tu lien; hence also save face (1915). To show (one's) face "make or put in an appearance" is from mid-14c. (shewen the face). To make a face "change the appearance of the face in disgust, mockery, etc." is from 1560s. Two faces under one hood as a figure of duplicity is attested from mid-15c.
Two fases in a hode is neuer to tryst. ["Awake lordes," 1460]
face (v.)youdaoicibaDictYouDict
"confront with assurance; show a bold face," mid-15c., from face (n.). From c. 1400 as "deface, disfigure." Meaning "to cover with something in front" is from 1560s; that of "turn the face toward" is from 1630s; meaning "be on the opposite page to" is from 1766. Intransitive sense "to turn the face" (especially in military tactics) is from 1630s. Related: Faced; facing. To face the music (1850, in U.S. Congressional debates) probably is theatrical rather than a reference to cavalry horses.