Where does “печеричка” come from?

печеричка (Ukrainian) comes from Ukrainian печери́ця, from Spanish pecera, from Spanish pez, from Old Spanish pez, from Latin pix, from Proto-Indo-European pik-, from Proto-Indo-European pi- — sap, juice.

Ancestry of “печеричка”, step by step

Step	Language	Word	Meaning
1	Ukrainian	печери́ця	champignon, Agaricus bisporus
2	Spanish	pecera	fish tank, aquarium
3	Spanish	pez	pitch, tar; fish; idiot, dimwit
4	Old Spanish	pez	pitch, tar; fish
5	Latin	pix	pitch, tar
6	Proto-Indo-European	pik-	to be angry; pitch; resin
7	Proto-Indo-European	pi-	sap, juice

Every word from Proto-Indo-European pi- →Every word from Proto-Indo-European pik- →Every word from Latin pix →