Where does “soprassegnale” come from?

soprassegnale (Italian) comes from Italian segnale, from Late Latin signale, from Latin signālis, from Latin signum, from Proto-Italic seknom, from Proto-Indo-European sek- — to cut, cut off, sever.

Ancestry of “soprassegnale”, step by step

Step	Language	Word	Meaning
1	Italian	segnale	signal, sign
2	Late Latin	signale	—
3	Latin	signālis	—
4	Latin	signum	visible indication: sign, mark, signal; seal,...
5	Proto-Italic	seknom	sign
6	Proto-Indo-European	sek-	to cut, cut off, sever

Every word from Proto-Indo-European sek- →Every word from Proto-Italic seknom →Every word from Latin signum →