Where does “spinal” come from?

spinal (French) comes from Late Latin spinalis, from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

spinal (French): spinal

Definitions

spinal

Ancestry of “spinal”, step by step

Step	Language	Word	Meaning
1	Late Latin	spinalis	of or belonging to the spine; spinal
2	Latin	spīna	a thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
3	Proto-Italic	speinā	thorn
4	Proto-Indo-European	spēy-	to stretch; thrive; succeed

Words derived from “spinal”

cérébrospinal
préspinal
spinale

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