Where does “amenza” come from?

amenza (Italian) comes from Latin āmentia, from Latin āmēns, from Latin ab-, from Latin āb, from Proto-Germanic *ab, from Proto-Indo-European apó.

amenza (Italian): amentia

Definitions

Step	Language	Word	Meaning
1	Latin	āmentia	madness, insanity
2	Latin	āmēns	frenzied, mad
3	Latin	ab-	from, away, away from; off; at a distance
4	Latin	āb	from, away from, out of
5	Proto-Germanic	*ab	—
6	Proto-Indo-European	apó	—