/ˈketːo/, [ˈk̟e̞t̪ːo̞]
Alkuperäkett- + -o, ultimately from kesi, possibly through kettää due to the geminated -tt-
Muodotketto(nominative, singular) · ketot(nominative, plural) · ketto(accusative, nominative, singular) · ketot(accusative, nominative, plural) · keton(accusative, genitive, singular) · ketot(accusative, genitive, plural) · keton(genitive, singular) · kettojen(genitive, plural) · kettoa(partitive, singular) · kettoja(partitive, plural) · ketossa(inessive, singular) · ketoissa(inessive, plural) · ketosta(elative, singular) · ketoista(elative, plural) · kettoon(illative, singular) · kettoihin(illative, plural) · ketolla(adessive, singular) · ketoilla(adessive, plural) · ketolta(ablative, singular) · ketoilta(ablative, plural)