Latin word silentium comes from Proto-Indo-European *seil-

Detailed word origin of silentium

Dictionary entry	Language	Definition
*seil-	Proto-Indo-European (ine-pro)
silent-	Latin (lat)
silentium	Latin (lat)	Inaction, inactivity, cessation, standstill. Obscurity. Silence, stillness, quiet, noiselessness.

Words with the same origin as silentium