Where does “Terny” come from?

Terny (English) comes from Ukrainian терни́, from Proto-Slavic tьrnъ, from Proto-Balto-Slavic tirnas, from Proto-Indo-European tr̥nós, from Proto-Indo-European (s)ter- — strong, firm, stiff, rigid; rigid, stiff; to...

Ancestry of “Terny”, step by step

Step	Language	Word	Meaning
1	Ukrainian	терни́	—
2	Proto-Slavic	tьrnъ	thorn; blackthorn, sloe-tree
3	Proto-Balto-Slavic	tirnas	thorn
4	Proto-Indo-European	tr̥nós	sharp, stiff
5	Proto-Indo-European	(s)ter-	strong, firm, stiff, rigid; rigid, stiff; to...

Every word from Proto-Indo-European (s)ter- →Every word from Proto-Indo-European tr̥nós →Every word from Proto-Balto-Slavic tirnas →