Where does “espine” come from?

espine (Middle French) comes from Old French espine, from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

Ancestry of “espine”, step by step

StepLanguageWordMeaning
1Old Frenchespinespine; backbone; spine; spike
2Latinspīnaa thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
3Proto-Italicspeināthorn
4Proto-Indo-Europeanspēy-to stretch; thrive; succeed

Words derived from “espine”

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