Where does “unseyn” come from?

unseyn (Middle English) comes from Old English unġesewen, from Proto-Germanic unsewanaz.

Ancestry of “unseyn”, step by step

StepLanguageWordMeaning
1Old Englishunġesewen—
2Proto-Germanicunsewanaz—
Every word from Proto-Germanic unsewanaz →Every word from Old English unġesewen →