Where does “sex abuse” come from?

sex abuse (English) comes from English abuse, from Middle English abusen, from Old French abus, from Latin abūsus, from Latin abūtor, from Latin ūtor, from Proto-Slavic *ǫtorъ, from Proto-Slavic torъ — to rub, turn; to drill, pierce.

Ancestry of “sex abuse”, step by step

sex abuse traces back through two separate lines of ancestry.

via English abuse

StepLanguageWordMeaning
1EnglishabuseImproper treatment or usage; application to a...
2Middle EnglishabusenTo misuse; to use improperly
3Old Frenchabusexcess; abuse
4Latinabūsushaving consumed, wasted or misused
5Latinabūtorto use up, exhaust, consume entirely
6Latinūtorto use, make use of, employ
7Proto-Slavic*ǫtorъcroze
8Proto-Slavictorъpaddock, pen
9Proto-Slavictertito rub, to scrape; to polish
10Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce

via English sex

StepLanguageWordMeaning
1EnglishsexA category into which sexually-reproducing...
2EnglishsectAn offshoot of a larger religion; a group sharing...
3Middle EnglishsecteA variety or sort; a category with a...
4Old Frenchsectea sect in philosophy or religion
5Late Latinsectaa sect in philosophy or religion, a school,...
6Latinsequipresent active infinitive of sequor; follow, come...
7LatinsequorI follow, come or go after
8Proto-Italicsekʷōrfollow, come/go after
9Proto-Indo-Europeansékʷetorto be following
10Proto-Indo-Europeansekʷ-to follow; to see; to say
Every word from Proto-Indo-European terh₁-