Where does “interro” come from?

interro (Latin) comes from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

interro (Latin): bury, inter

Definitions

interro traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Latin	în	in, at, on, upon, from (space)
2	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
3	Proto-Italic	en	in
4	Proto-Indo-European	h₁én	in

Step	Language	Word	Meaning
1	Latin	Terra	Terra goddess of the Earth
2	Proto-Indo-European	ters-	dry