The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Indo-European*skek-
- Proto-Germanic*skakaną
- Proto-West Germanic*skakan
- Old Englishsċacan
- Middle Englishschaken
- Englishshake
- Englishshakable
- English todayunshakable
Etymology from Wiktionary, CC BY-SA 4.0.