Where does “cerebroespinal” come from?

cerebroespinal (Spanish) comes from Spanish espinal, from Spanish espina, from Catalan Espina, from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

cerebroespinal (Spanish): cerebrospinal

Definitions

cerebrospinal

Ancestry of “cerebroespinal”, step by step

Step	Language	Word	Meaning
1	Spanish	espinal	spinal
2	Spanish	espina	thorn; fishbone; spine, backbone, spinal column
3	Catalan	Espina	thorn, spike
4	Latin	spīna	a thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
5	Proto-Italic	speinā	thorn
6	Proto-Indo-European	spēy-	to stretch; thrive; succeed

Every word from Proto-Indo-European spēy- →Every word from Proto-Italic speinā →Every word from Latin spīna →