The story
- Proto-Indo-European*h₂éwh₂os
- Latinavunculus
- Old Frenchuncle
- Middle Englishuncle
- Englishuncleclip.
- Englishunc
- Old Englishslyppe
- Old English*sloppe
- Middle English*sloppe?
- Englishslop
- English todayuncslop
Etymology from Wiktionary, CC BY-SA 4.0.