Where does “sich” come from?

sich (Old Welsh) comes from Proto-Brythonic sɨx, from Latin siccus, from Proto-Celtic siskʷos, from Proto-Indo-European sisku-.

Ancestry of “sich”, step by step

StepLanguageWordMeaning
1Proto-Brythonicsɨxdry
2Latinsiccusdry; sober; thirsty
3Proto-Celticsiskʷosdry
4Proto-Indo-Europeansisku-—

Words derived from “sich”

Every word from Proto-Indo-European sisku- →Every word from Proto-Celtic siskʷos →Every word from Latin siccus →