The Proto-Indo-European word *k̂wen(to)-
Word *k̂wen(to)-
Meaning holy
Synonyms *dʰēh₁-s(-io-), *sakros, *noibʰos

Comments
Lith. šventas, Ltv. svinēt, Russ. svjatoj, Av. spanyah, Goth. hunsl, Polish święty, Old Prussian swints, ON hunsl, Eng. hūsel/housel, OCS svętŭ, Kurd. khawén

Other words that might be of interest
*deiwós ‘god’, *hₐénsus ‘god, spirit’