woebegone (adj.)

c. 1300, in expressions such as me is wo bigone "woe has beset me," from woe + begon, past participle of Middle English bego "to beset, surround, overwhelm," from Old English began "go over, traverse; inhabit, occupy; encompass, surround" (see be- + go (v.)). The verb is now obsolete, and its only survival is the fossilized past participle in this word.