The story
- Proto-Indo-European*sem-
- Proto-Indo-European*somHós
- Proto-Hellenic*homós
- Ancient Greekὁμός (homós)
- Germanhomo-
- 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
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Latinsexuālis
- Germansexual
- Germanhomosexua
- English todayhomosexual
Borrowed from German homosexual, from homo- (“same”) + sexual (“relating to sex or sexuality”), coined by Karl Maria Kertbeny in 1868, and popularized in Richard von Krafft-Ebing's Psychopathia Sexualis (2nd ed. 1887, in German) and Charles Gilbert Chaddock's 1892 English translation thereof (compare bisexual), displacing the slightly older term Uranian. Equivalent to homo- + -sexual.
Etymology from Wiktionary, CC BY-SA 4.0.