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*h₁es-
- Proto-Indo-European*h₁ésti
- Proto-Indo-European*bʰuH-
- Proto-Indo-European*bʰúHt
- Proto-Italic*ezom~*som
- Old Latinesum
- Latinsum
- Latin*essēns
- Latinessentia
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Late Latinessentiālis
- Englishessential
- English todayunessential
Etymology from Wiktionary, CC BY-SA 4.0.