Worse
Old English wyrsa, wiersa (adjective), wiers (adverb), of Germanic origin; related to war.
wiktionary
From Middle English worse, werse, from Old English wiersa, from Proto-Germanic *wirsizô. Cognate with Dutch wers(“worse”).
etymonline
worse (adj.)
Old English wiersa, wyrsa "worse," from Proto-Germanic *wers-izon- (source also of Old Saxon wirs, Old Norse verri, Swedish värre, Old Frisian wirra, Old High German wirsiro, Gothic wairsiza "worse"), comparative of PIE *wers- (1) "to confuse, mix up" (source also of Old High German werra "strife," Old Saxon werran "to entangle, compound;" see war (n.)). Used as a comparative of bad, evil, ill or as the opposite of better. The adverb is Old English wyrs; the noun is Old English wyrsa. Phrase for better or for worse is attested from late 14c. (for bet, for wers); to change for the worse is recorded from c. 1400.
