Where does “insaniendus” come from?

insaniendus (Latin) comes from Latin insanio, from Latin īnsānus, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Definitions

Ancestry of “insaniendus”, step by step

Step	Language	Word	Meaning
1	Latin	insanio	I am insane
2	Latin	īnsānus	mad, insane, demented
3	Latin	īn-	un-, non-, not
4	Latin	în	in, at, on, upon, from (space)
5	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
6	Proto-Italic	en	in
7	Proto-Indo-European	h₁én	in

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Proto-Italic en →