Old English wrað "angry" (literally "tormented, twisted"), from Proto-Germanic *wraith- (source also of Old Frisian wreth "evil," Old Saxon wred, Middle Dutch wret, Dutch wreed "cruel," Old High German reid, Old Norse reiðr "angry, offended"), from *wreit-, from PIE root *wer- (2) "to turn, bend." Rare or obsolete from early 16c. to mid-19c., but somewhat revived since, especially in dignified writing, or this:

Secretary: "The Dean is furious. He's waxing wroth."

Quincy Adams Wagstaf [Groucho]: "Is Roth out there too? Tell Roth to wax the Dean for a while."

["Horse Feathers," 1932]

1520s, "distorted, somewhat twisted to one side," from obsolete verb wry "to contort, to twist or turn," from Old English wrigian "to turn, bend, move, go," from Proto-Germanic *wrig- (source also of Old Frisian wrigia "to bend," Middle Low German wrich "turned, twisted"), from PIE *wreik- "to turn" (source also of Greek rhoikos "crooked," Lithuanian raišas "lame, limping"), from root *wer- (2) "to turn, bend." Of words, thoughts, etc., from 1590s. The original sense is preserved in awry.