Where does “undōn” come from?

undōn (Middle English) comes from Old English ondōn, from Proto-Germanic andadōnaz, from Proto-Germanic andadōną — to undo.

Ancestry of “undōn”, step by step

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

Words derived from “undōn”

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