Where does “ετήσιος” come from?

ετήσιος (Greek) comes from Greek έτος, from Ancient Greek ἔτος, from Ancient Greek ϝέτος, from Proto-Indo-European wétos, from Proto-Indo-European wet- — year; year-old.

ετήσιος (Greek): annual

Definitions

annual

Ancestry of “ετήσιος”, step by step

Step	Language	Word	Meaning
1	Greek	έτος	year; volume
2	Ancient Greek	ἔτος	year
3	Ancient Greek	ϝέτος	—
4	Proto-Indo-European	wétos	year
5	Proto-Indo-European	wet-	year; year-old

Every word from Proto-Indo-European wet- →Every word from Proto-Indo-European wétos →Every word from Ancient Greek ϝέτος →