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*dʰeh₁-
- Proto-Indo-European*dʰeh₁k-
- Proto-Indo-European*dʰh₁kyéti
- Proto-Italic*θakjō
- Proto-Italic*fakjō
- Latinfaciō
- Latinfactiōnem
- Old Frenchfaçon
- Middle Englishfacioun
- Englishfashion
- Englishfashionable
- English todayunfashionable
From un- + fashionable.
Etymology from Wiktionary, CC BY-SA 4.0.