Where does “kos” come from?

kos (Old Dutch) comes from Proto-West Germanic koss, from Proto-Germanic kussaz — kiss.

Ancestry of “kos”, step by step

StepLanguageWordMeaning
1Proto-West Germanickosskiss
2Proto-Germanickussazkiss

Words derived from “kos”

Every word from Proto-Germanic kussaz →Every word from Proto-West Germanic koss →
kos — Etymology, Origin & Word History | Etymology Explorer