Where does “спинной” come from?

спинной (Russian) comes from Russian спина́, from Polish spina, from Latin spīna, from Proto-Italic speinā, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

спинной (Russian): spinal, dorsal

Definitions

  1. spinal, dorsal

Ancestry of “спинной”, step by step

StepLanguageWordMeaning
1Russianспина́back, ridge
2Polishspinasudden jitters or anxiety; Augmentative of...
3Latinspīnaa thorn or a thorny tree or shrub, such as whitethorn, hawthorn, or blackthorn
4Proto-Italicspeināthorn
5Proto-Indo-Europeanspēy-to stretch; thrive; succeed
Every word from Proto-Indo-European spēy- →Every word from Proto-Italic speinā →Every word from Latin spīna →