Where does “piikkipensas” come from?

piikkipensas (Finnish) comes from Finnish piikki, from Swedish spik, from Old Norse spíkr, from Proto-Germanic spīkaz, from Proto-Indo-European spēy- — to stretch; thrive; succeed.

piikkipensas (Finnish): thornbush, thorn

Definitions

thornbush, thorn

Ancestry of “piikkipensas”, step by step

piikkipensas traces back through two separate lines of ancestry.

via Finnish piikki

Step	Language	Word	Meaning
1	Finnish	piikki	spike; Short for piikkikenkä; tine, prong
2	Swedish	spik	nail; spike-shaped metal fastener; an fail-safe...
3	Old Norse	spíkr	—
4	Proto-Germanic	spīkaz	—
5	Proto-Indo-European	spēy-	to stretch; thrive; succeed

via Finnish pensas

Step	Language	Word	Meaning
1	Finnish	pensas	bush; shrub
2	Proto-Finnic	pensas	bush
3	Proto-Finnic	pensa	—

Every word from Proto-Indo-European spēy- →Every word from Proto-Germanic spīkaz →Every word from Old Norse spíkr →