The story
- Proto-Indo-European*né
- Proto-Germanic*ne
- Proto-Indo-European*ís?
- Proto-Indo-European*h₁óynos
- Proto-Germanic*ainaz
- Proto-Germanic*nainaz
- Proto-West Germanic*nain
- Old Englishnān
- Middle Englishnon
- Old Englishnān
- Old Englishnān-
- Middle Englishnon-
- Englishnon-
- Englishintervention
- English todaynonintervention
From non- + intervention.
Etymology from Wiktionary, CC BY-SA 4.0.