Where does “infantaria” come from?

infantaria (Portuguese) comes from Italian infanteria, from Italian infante, from Latin īnfāntem, from Latin īnfāns, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

infantaria (Portuguese): infantry

Definitions

infantry

Ancestry of “infantaria”, step by step

Step	Language	Word	Meaning
1	Italian	infanteria	—
2	Italian	infante	infant; baby, infant; infanta
3	Latin	īnfāntem	—
4	Latin	īnfāns	speechless, inarticulate
5	Latin	īn-	un-, non-, not
6	Latin	în	in, at, on, upon, from (space)
7	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
8	Proto-Italic	en	in
9	Proto-Indo-European	h₁én	in

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