Where does “lakritsirousku” come from?

lakritsirousku (Finnish) comes from Finnish lakritsi, from Swedish lakrits, from Late Latin liquiritia, from Ancient Greek γλυκύρριζα, from Ancient Greek γλυκύς, from Proto-Hellenic *dlukús.

lakritsirousku (Finnish): A milk-cap, "Lactarius helvus"

Definitions

A milk-cap, "Lactarius helvus"

Ancestry of “lakritsirousku”, step by step

lakritsirousku traces back through two separate lines of ancestry.

via Finnish lakritsi

Step	Language	Word	Meaning
1	Finnish	lakritsi	licorice, liquorice
2	Swedish	lakrits	licorice/liquorice
3	Late Latin	liquiritia	—
4	Ancient Greek	γλυκύρριζα	licorice
5	Ancient Greek	γλυκύς	sweet
6	Proto-Hellenic	*dlukús	—

via Finnish rousku

Step	Language	Word	Meaning
1	Finnish	rousku	A milk-cap
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-Hellenic *dlukús →Every word from Ancient Greek γλυκύς →Every word from Ancient Greek γλυκύρριζα →