Where does “non-étaigther” come from?

non-étaigther (Old Irish) comes from Old Irish no-, from Proto-Indo-European nū — now.

Ancestry of “non-étaigther”, step by step

StepLanguageWordMeaning
1Old Irishno-Used to support prototonic verb forms where no...
2Proto-Indo-Europeannūnow
Every word from Proto-Indo-European nū →Every word from Old Irish no- →