Where does “erillislaki” come from?

erillislaki (Finnish) comes from Finnish laki, from Old Swedish lagh, from Old Norse lág, from Old Norse leggja, from Proto-Germanic lagjaną, from Proto-Indo-European legʰ- — to lie.

Ancestry of “erillislaki”, step by step

erillislaki traces back through two separate lines of ancestry.

via Finnish laki

Step	Language	Word	Meaning
1	Finnish	laki	A summit, topmost point of eg. a hill or...
2	Old Swedish	lagh	—
3	Old Norse	lág	a felled tree; log; lying tree
4	Old Norse	leggja	to lay, place, put; to make, build
5	Proto-Germanic	lagjaną	to lay, to place in a resting position
6	Proto-Indo-European	legʰ-	to lie

via Finnish erillinen

Step	Language	Word	Meaning
1	Finnish	erillinen	separate, discrete, dividual
2	Finnish	-llinen	Forms adjectives that indicate time; Forms...
3	Finnish	-inen	-like, -ous, -y; -en; Creates adjectives from...
4	Finnish	-uus	Forms nouns from adjectives, expressing a quality
5	Proto-Finnic	-uc	-ness, -hood

Every word from Proto-Indo-European legʰ- →