Where does “kauhukalkkarokäärme” come from?

kauhukalkkarokäärme (Finnish) comes from Finnish kalkkarokäärme, from Finnish käärme, from Proto-Finnic kärmeh, from Proto-Finnic kärmeš, from Proto-Balto-Slavic kr̥mis, from Proto-Indo-European kʷŕ̥mis — worm.

kauhukalkkarokäärme (Finnish): South American rattlesnake, Crotalus durissus

Definitions

South American rattlesnake, Crotalus durissus

Ancestry of “kauhukalkkarokäärme”, step by step

kauhukalkkarokäärme traces back through two separate lines of ancestry.

via Finnish kalkkarokäärme

Step	Language	Word	Meaning
1	Finnish	kalkkarokäärme	rattlesnake
2	Finnish	käärme	snake
3	Proto-Finnic	kärmeh	snake
4	Proto-Finnic	kärmeš	—
5	Proto-Balto-Slavic	kr̥mis	worm
6	Proto-Indo-European	kʷŕ̥mis	worm

via Finnish kauhu

Step	Language	Word	Meaning
1	Finnish	kauhu	Horror, terror, dread
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	Forms nouns from adjectives, nouns

Every word from Proto-Indo-European kʷŕ̥mis →