Where does “spine” come from?

spine (Friulian) comes from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

spine (Friulian): thorn

Definitions

  1. thorn

Ancestry of “spine”, step by step

StepLanguageWordMeaning
1Latinspīnaa thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
2Proto-Italicspeināthorn
3Proto-Indo-Europeanspēy-to stretch; thrive; succeed
Every word from Proto-Indo-European spēy- →Every word from Proto-Italic speinā →Every word from Latin spīna →