Where does “hajuherne” come from?

hajuherne (Finnish) comes from Finnish herne, from Proto-Finnic herneh, from Proto-Balto-Slavic *źírˀnan, from Proto-Indo-European ǵr̥h₂nóm, from Proto-Indo-European ǵr̥h₂nós, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

hajuherne (Finnish): sweet pea

Definitions

sweet pea

Ancestry of “hajuherne”, step by step

hajuherne traces back through two separate lines of ancestry.

via Finnish herne

Step	Language	Word	Meaning
1	Finnish	herne	pea
2	Proto-Finnic	herneh	pea
3	Proto-Balto-Slavic	*źírˀnan	grain
4	Proto-Indo-European	ǵr̥h₂nóm	grain
5	Proto-Indo-European	ǵr̥h₂nós	matured, grown old
6	Proto-Indo-European	ǵerh₂-	to grow old, to mature

via Finnish haju

Step	Language	Word	Meaning
1	Finnish	haju	smell, whiff; clue, slightest idea
2	Proto-Finno-Ugric	*haju	—

Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵr̥h₂nós →Every word from Proto-Indo-European ǵr̥h₂nóm →