Where does “enclos” come from?

enclos (Middle English) comes from Old French enclose, from Vulgar Latin inclaudo, from Latin inclūdō, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “enclos”, step by step

Step	Language	Word	Meaning
1	Old French	enclose	—
2	Vulgar Latin	inclaudo	—
3	Latin	inclūdō	to shut up or in, confine, enclose, imprison, keep in
4	Latin	īn-	un-, non-, not
5	Latin	în	in, at, on, upon, from (space)
6	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
7	Proto-Italic	en	in
8	Proto-Indo-European	h₁én	in

Words derived from “enclos”

enclose
encloser
encloseth
enclosable
enclosest
disenclose
enclosen
inclosen

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