Where does “sili-” come from?

sili- (Finnish) comes from Livonian sī, from Proto-Finno-Ugric *süü, from Proto-Uralic süji, from Proto-Slavic svojь, from Proto-Indo-European swoyos, from Proto-Indo-European swé — self.

Ancestry of “sili-”, step by step

StepLanguageWordMeaning
1Livoniansīfault blame, guilt, culpability
2Proto-Finno-Ugric*süü—
3Proto-Uralicsüji—
4Proto-Slavicsvojьone's own
5Proto-Indo-Europeanswoyos—
6Proto-Indo-Europeanswéself
Every word from Proto-Indo-European swé →Every word from Proto-Indo-European swoyos →Every word from Proto-Slavic svojь →