The story
- Proto-Indo-European*sek-
- Proto-Indo-European*séks-u-s
- Proto-Italic*seksus
- Proto-Indo-European*sek-
- Proto-Indo-European*sékh₁yeti
- Proto-Italic*sekaō
- Latinsecō
- Latinsecāre?
- Latinsexus
- Old Frenchsexe
- Middle Englishsexe
- Englishsex
- Latinō
- Old Frenchoh
- Middle Englisho
- EnglishO
- Middle Englisho
- Englishoh
- English todaysexo
Etymology from Wiktionary, CC BY-SA 4.0.