Where does “perunat” come from?

perunat (Finnish) comes from Finnish peruna, from Swedish jordpäron, from Swedish jord, from Old Swedish iorþ, from Old Norse jǫrð, from Proto-Germanic erþō, from Proto-Indo-European h₁er- — earth.

perunat (Finnish): Nominative plural form of peruna; potatoes

Definitions

Nominative plural form of peruna; potatoes

Ancestry of “perunat”, step by step

Step	Language	Word	Meaning
1	Finnish	peruna	potato, "Solanum tuberosum"
2	Swedish	jordpäron	potato
3	Swedish	jord	earth, soil; a rock- or sand-based unconsolidated...
4	Old Swedish	iorþ	earth, land
5	Old Norse	jǫrð	earth
6	Proto-Germanic	erþō	earth
7	Proto-Indo-European	h₁er-	earth

Every word from Proto-Indo-European h₁er- →Every word from Proto-Germanic erþō →Every word from Old Norse jǫrð →