Where does “jääruohokasvi” come from?

jääruohokasvi (Finnish) comes from Finnish kasvi, from Finnish kasvaa, from Proto-Finnic kasvadak, from Proto-Indo-European h₂ewks-.

Ancestry of “jääruohokasvi”, step by step

jääruohokasvi traces back through 3 separate lines of ancestry.

via Finnish kasvi

StepLanguageWordMeaning
1Finnishkasviplant
2Finnishkasvaato grow
3Proto-Finnickasvadakto grow
4Proto-Indo-Europeanh₂ewks-—

via Finnish ruoho

StepLanguageWordMeaning
1Finnishruohograss mass noun; blade of grass individual specimen
2Proto-Finnicroohograss
3Proto-Germanicgrasągrass
4Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow

via Finnish jää

StepLanguageWordMeaning
1Finnishjääice; rock; in the expression on the rocks =...
2Proto-Finnicjääice
3Proto-Uralicjäŋeice
Every word from Proto-Indo-European h₂ewks- →Every word from Proto-Finnic kasvadak →Every word from Finnish kasvaa →