Where does “borneonpiikikäs” come from?

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

borneonpiikikäs (Finnish): thick-spined porcupine, Hystrix crassispinis

Definitions

thick-spined porcupine, Hystrix crassispinis

Ancestry of “borneonpiikikäs”, step by step

borneonpiikikäs traces back through two separate lines of ancestry.

via Finnish piikikäs

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

via Finnish Borneo

Step	Language	Word	Meaning
1	Finnish	Borneo	Borneo
2	Portuguese	Borneo	—
3	Sanskrit	वरुणद्वीप	island of Varuna

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