Where does “νεροαρουραίος” come from?

νεροαρουραίος (Greek) comes from Greek νερό, from Byzantine Greek νερόν, from Ancient Greek νηρός, from Ancient Greek νεαρός, from Proto-Indo-European newr̥ós, from Proto-Indo-European néwos, from Proto-Indo-European new- — new; to nod, assent to.

νεροαρουραίος (Greek): water vole, water rat

Definitions

water vole, water rat

Ancestry of “νεροαρουραίος”, step by step

νεροαρουραίος traces back through two separate lines of ancestry.

via Greek νερό

Step	Language	Word	Meaning
1	Greek	νερό	water; glass / bottle of water; water bill
2	Byzantine Greek	νερόν	—
3	Ancient Greek	νηρός	wet, damp
4	Ancient Greek	νεαρός	young, youthful
5	Proto-Indo-European	newr̥ós	—
6	Proto-Indo-European	néwos	new
7	Proto-Indo-European	new-	new; to nod, assent to

via Greek αρουραίος

Step	Language	Word	Meaning
1	Greek	αρουραίος	rat; devious and evil person
2	Ancient Greek	ἀρουραῖος	of or from the country, rural, rustic
3	Ancient Greek	-αῖος	Suffix added to nouns or adjectives, forming adjectives: pertaining to, belonging to ("of")
4	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
5	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European new- →Every word from Proto-Indo-European néwos →Every word from Proto-Indo-European newr̥ós →