Where does “infantin” come from?

infantin (French) comes from French enfantin, from French enfant, from Middle French enfant, from Old French enfant, from Latin īnfāntem, from Latin īnfāns, from Latin īn-, from Latin în — in.

Ancestry of “infantin”, step by step

Step	Language	Word	Meaning
1	French	enfantin	childlike, childish; child's, for children
2	French	enfant	child
3	Middle French	enfant	child
4	Old French	enfant	child
5	Latin	īnfāntem	—
6	Latin	īnfāns	speechless, inarticulate
7	Latin	īn-	un-, non-, not
8	Latin	în	in, at, on, upon, from (space)
9	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
10	Proto-Italic	en	in
11	Proto-Indo-European	h₁én	in

Words derived from “infantin”

infantine

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