Where does “emplien” come from?

emplien (Middle English) comes from Old French emplier, from Latin impleo, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “emplien”, step by step

Step	Language	Word	Meaning
1	Old French	emplier	Alternative form of emploiier; to fill
2	Latin	impleo	I fill up, fill full; cover; I satisfy, satiate;...
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 →