Where does “espinna” come from?

espinna (Old Portuguese) comes from Latin spina, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

Ancestry of “espinna”, step by step

StepLanguageWordMeaning
1Latinspinaa thorny tree or shrub, such as whitethorn,...
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 spina →