Where does “unrighten” come from?

unrighten (Middle English) comes from Middle English unright, from Old English unriht, from Proto-Germanic unrehtaz, from Proto-Germanic rehtaz, from Proto-Indo-European h₃reǵtós, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

Ancestry of “unrighten”, step by step

StepLanguageWordMeaning
1Middle Englishunrightnot right; unrighteous; unjust; wrong
2Old Englishunrihtnot right, wrong; illegal; wrong, evil,...
3Proto-Germanicunrehtazwrong, bad, unjust
4Proto-Germanicrehtazright, straight; morally upright, just
5Proto-Indo-Europeanh₃reǵtósstraightened, right, upright
6Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just
Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Indo-European h₃reǵtósEvery word from Proto-Germanic rehtaz
unrighten — Etymology, Origin & Word History | Etymology Explorer