Where does “perunalastu” come from?

perunalastu (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.

perunalastu (Finnish): potato chip US, potato crisp UK

Definitions

potato chip US, potato crisp UK

Ancestry of “perunalastu”, step by step

perunalastu traces back through two separate lines of ancestry.

via Finnish peruna

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

via Finnish lastu

Step	Language	Word	Meaning
1	Finnish	lastu	shaving; chip; short story
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	Forms nouns from adjectives, nouns

Words derived from “perunalastu”

maalaisperunalastu

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