Where does “emperris” come from?

emperris (Old French) comes from Old French empereriz, from Latin imperātrīx, from Latin imperō, from Latin im-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

Ancestry of “emperris”, step by step

Step	Language	Word	Meaning
1	Old French	empereriz	empress
2	Latin	imperātrīx	A female ruler of an empire, empress
3	Latin	imperō	to command, give orders to, impose, demand
4	Latin	im-	Alternative form of in-; form of "in"; in
5	Latin	īn-	un-, non-, not
6	Latin	în	in, at, on, upon, from (space)
7	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
8	Proto-Italic	en	in
9	Proto-Indo-European	h₁én	in

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