What is the X in X-mas?
1520s, "distorted, somewhat twisted," from obsolete verb wry "to contort, to twist or turn," from Old English wrigian "to turn, bend, move, go," from Proto-Germanic *wrig- (cf. Old Frisian wrigia "to bend," Middle Low German wrich "turned, twisted"), from PIE *wreik- "to turn" (cf. Greek rhoikos "crooked," Lithuanian raisas "paralysed"), from root *wer- (3) "to turn, bend" (see versus). Of words, thoughts, etc., from 1590s. The original sense is preserved in awry.