Where does “basisår” come from?

basisår (Norwegian Bokmål) comes from Norwegian Bokmål 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.

basisår (Norwegian Bokmål): a base year

Definitions

a base year

Ancestry of “basisår”, step by step

basisår traces back through two separate lines of ancestry.

via Norwegian Bokmål år

Step	Language	Word	Meaning
1	Norwegian Bokmål	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 Norwegian Bokmål basis

Step	Language	Word	Meaning
1	Norwegian Bokmål	basis	basis; base
2	Latin	basis	A pedestal, foot, base; basis, foundation; The...
3	Ancient Greek	βάσις	step; rhythm; foot
4	Proto-Hellenic	gʷə́tis	step
5	Proto-Indo-European	gʷémtis	step, act of walking
6	Proto-Indo-European	gʷem-	to step

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