Where does “encensso” come from?

encensso (Old Portuguese) comes from Latin incēnsum, from Latin incensus, from Latin incendō, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “encensso”, step by step

Step	Language	Word	Meaning
1	Latin	incēnsum	—
2	Latin	incensus	set on fire; burnt; excited
3	Latin	incendō	to set on fire, burn, kindle
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 “encensso”

incenso
incenso
ençenço
jnçenso
incensario
insensaryo

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