Where does “jämnårig” come from?

jämnårig (Swedish) comes from Swedish år, from French are, from Latin ārea, from Proto-Italic āzeā, from Proto-Indo-European h₂eHs-e-yeh₂, from Proto-Indo-European h₂eHs- — to be/become dry; to burn, to glow; hearth.

jämnårig (Swedish): of the same age; beeing a peer

Definitions

of the same age; beeing a peer

Ancestry of “jämnårig”, step by step

jämnårig traces back through two separate lines of ancestry.

via Swedish år

Step	Language	Word	Meaning
1	Swedish	år	a year
2	French	are	an are
3	Latin	ārea	a piece of level ground, a vacant place (esp. in the town)
4	Proto-Italic	āzeā	—
5	Proto-Indo-European	h₂eHs-e-yeh₂	—
6	Proto-Indo-European	h₂eHs-	to be/become dry; to burn, to glow; hearth

via Swedish jämn

Step	Language	Word	Meaning
1	Swedish	jämn	even; divisible by 2; even; a function of one...
2	Old Swedish	iæmpn	even
3	Old Norse	jafn	even; equal, the same
4	Proto-Germanic	ebnaz	even, level
5	Proto-Indo-European	h₁émnos	equal, straight; flat, level, even

Every word from Proto-Indo-European h₂eHs- →Every word from Proto-Indo-European h₂eHs-e-yeh₂ →Every word from Proto-Italic āzeā →