What is the X in X-mas?
Old English utweard "toward the outside, external" (of an enclosure, surface, etc.), earlier utanweard, from ute, utan "outside" (from ut; see out) + -weard (see -ward). Of persons, in reference to the external appearance (usually opposed to inner feelings), it is attested from c.1500. Also as an adverb in Old English (utaword). Outward-bound "directed on a course out from home port" is first recorded c.1600; with capital initials, it refers to a sea school founded in 1941. Related: Outwardly; outwardness.