Where does “kùs” come from?

kùs (Kashubian) comes from German kuss, from Middle High German kus, from Old High German kus, from Proto-West Germanic koss, from Proto-Germanic kussaz — kiss.

Ancestry of “kùs”, step by step

StepLanguageWordMeaning
1Germankusskiss
2Middle High Germankus—
3Old High Germankuskiss
4Proto-West Germanickosskiss
5Proto-Germanickussazkiss
Every word from Proto-Germanic kussaz →Every word from Proto-West Germanic koss →Every word from Old High German kus →