eş: Handlung, Vorgang, Nacktdarstellung, Nacktfoto, Darbietung, Nummer
köken: Etymology tree Proto-Indo-European *h₂eǵ- Proto-Indo-European *-eti Proto-Indo-European *h₂éǵeti Proto-Italic *agō Latin agō Latin āctusbor. German Akt Borrowed from Latin āctus. The artistic sense derives from the 19th century practice of sketching models carrying out actions, for which the models would usually be nude.
köken: /seikau/ → /seikɔː/ → /seːkoː/ Ultimately from Middle Chinese compound 性交 (sjengᴴ kæw, literally “sex + cross”). Compare modern Hakka sin-kâu or Cantonese sing³ gaau¹. First cited to a text from 1912.
köken: Etymology tree Latin cōpula Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -ō Latin cōpulō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin cōpulātiōlbor. Polish kopulacja Learned borrowing from Latin cōpulātiō.
köken: From közösül (“to have sexual intercourse with someone”) + -és (noun-forming suffix), from közös (“common, shared”) + -ül (verb-forming suffix).