СВЕТ

"sveti" - "holy" (South Slavic), "svet" means "light" in Russian, while in Georgian "sveti" means "pillar"

The name of the most ancient Georgian church "Svetitskhoveli" is translated as "life pillar, column". The column of the church is considered sacred, from which it is not far to the meaning of "holy". At the same time, in Slavic languages ​​"sveti" means precisely "holy". It is possible to trace the shift in the meaning of the word from "column" to "sacred" with further borrowing into Slavic languages ​​already in the form of an adjective. Perhaps, the hypothesis looks quite complicated, but the Slavic "sveti" has no etymology at all.