Where does “korkokverko” come from?

korkokverko (Esperanto) comes from Esperanto Korko, from English Cork, from Middle English cork, from Middle Dutch curc, from Spanish corcho, from Latin cortex, from Proto-Indo-European *(s)kort-ek-s.

korkokverko (Esperanto): cork oak

Definitions

cork oak

Ancestry of “korkokverko”, step by step

korkokverko traces back through two separate lines of ancestry.

via Esperanto Korko

Step	Language	Word	Meaning
1	Esperanto	Korko	cork bottle stopper
2	English	Cork	(County Cork)
3	Middle English	cork	oak bark, cork
4	Middle Dutch	curc	cork
5	Spanish	corcho	cork
6	Latin	cortex	The bark of a tree; the bark of a cork tree;...
7	Proto-Indo-European	*(s)kort-ek-s	—

via Esperanto kverko

Step	Language	Word	Meaning
1	Esperanto	kverko	oak, oak tree; oak
2	Latin	quercus	An oak, oak-tree, especially the Italian oak; Of...
3	Proto-Italic	kʷerkus	—
4	Proto-Indo-European	pérkus	oak
5	Proto-Indo-European	perkʷ-	oak

Every word from Proto-Indo-European *(s)kort-ek-s →Every word from Latin cortex →Every word from Spanish corcho →