Where does “undo” come from?

Undo comes from Middle English undōn, from Old English ondōn, from Proto-Germanic andadōną, meaning to reverse or open.

undo (English): To reverse the effects of an action; To unfasten;...

Definitions

  1. To reverse the effects of an action; To unfasten;...

Ancestry of “undo”, step by step

StepLanguageWordMeaning
1Middle Englishundōn—
2Old Englishondōnto undo
3Proto-Germanicandadōnaz—
4Proto-Germanicandadōnąto undo

Words derived from “undo”

Every word from Proto-Germanic andadōną →Every word from Proto-Germanic andadōnaz →Every word from Old English ondōn →