Latin word signum comes from Proto-Indo-European *sēik-

Detailed word origin of signum

Dictionary entry	Language	Definition
*sēik-	Proto-Indo-European (ine-pro)	to cut
signum	Latin (lat)	(Medieval Latin) a signum (medieval tower bell used particularly for ringing the 8 canonical hours). A mark, sign, emblem. A miracle.

Words with the same origin as signum