Where does “preinfantil” come from?

preinfantil (Spanish) comes from Spanish infantil, from Latin infantilis, from Latin īnfāns, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

preinfantil (Spanish): of or pertaining to an age group below that of infantil (generally around age 11-12 years old)

Definitions

of or pertaining to an age group below that of infantil (generally around age 11-12 years old)

Ancestry of “preinfantil”, step by step

Step	Language	Word	Meaning
1	Spanish	infantil	childish; immature
2	Latin	infantilis	pertaining to an infant; infantile
3	Latin	īnfāns	speechless, inarticulate
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

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