Where does “endosar” come from?

endosar (Bikol Central) comes from Spanish endosar, from French endosser, from French en-, from Old French en-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

Ancestry of “endosar”, step by step

Step	Language	Word	Meaning
1	Spanish	endosar	to saddle
2	French	endosser	to carry on one's back; to assume responsibility,...
3	French	en-	en- all meanings
4	Old French	en-	en- in; into
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 →