Latin word scientia comes from Proto-Indo-European *sēik-, Proto-Indo-European *ski-, and later Latin scio (I can, know, understand, have knowledge.. I know carnally.)

Detailed word origin of scientia

Dictionary entry	Language	Definition
*sēik-	Proto-Indo-European (ine-pro)	to cut
*ski-	Proto-Indo-European (ine-pro)
*skijō	Proto-Italic (itc-pro)
scio	Latin (lat)	I can, know, understand, have knowledge.. I know carnally.
scientia	Latin (lat)	Knowledge.

Words with the same origin as scientia