Where does “sulkukotilo” come from?

sulkukotilo (Finnish) comes from Finnish kotilo, from Finnish -lö, from Finnish -lä, from Finnish -as, from Proto-Finnic -s, from Proto-Finno-Ugric -s.

sulkukotilo (Finnish): door snail snail of the family Clausiliidae

Definitions

door snail snail of the family Clausiliidae

Ancestry of “sulkukotilo”, step by step

sulkukotilo traces back through two separate lines of ancestry.

via Finnish kotilo

Step	Language	Word	Meaning
1	Finnish	kotilo	gastropod, mollusc, seashell, snail; the shell of...
2	Finnish	-lö	Front vowel variant of -lo
3	Finnish	-lä	Front vowel variant of -la
4	Finnish	-as	Forms some adjectives; Forms some nouns
5	Proto-Finnic	-s	Forms nouns
6	Proto-Finno-Ugric	-s	—

via Finnish sulku

Step	Language	Word	Meaning
1	Finnish	sulku	bracket; blockade; lock
2	Finnish	sulkea	to close, shut; to turn off, to switch off
3	Proto-Finnic	sülkedäk	to spit
4	Proto-Finno-Permic	śulke-	—

Words derived from “sulkukotilo”

Every word from Proto-Finno-Ugric -s →Every word from Finnish -lä →Every word from Finnish -lö →