Where does “adjoindre” come from?

adjoindre (Anglo-Norman) comes from Latin adiungō, from Latin ad-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “adjoindre”, step by step

Step	Language	Word	Meaning
1	Latin	adiungō	to add, join, attach, append, annex or bind to (something)
2	Latin	ad-	to; usually prefixed to verbs, in which cases it...
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

Words derived from “adjoindre”

adjoin
adjoineth

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Latin ad- →