Where does “puertecita” come from?

puertecita (Spanish) comes from Spanish puerta, from Old Spanish puerta, from Latin porta, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “puertecita”, step by step

Step	Language	Word	Meaning
1	Spanish	puerta	door; gate; doorway, doorstep, gateway
2	Old Spanish	puerta	—
3	Latin	porta	gate, especially of a city; entrance, passage,...
4	Proto-Indo-European	per-	before, in front; first; to go through
5	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Latin porta →