Where does “idrometrico” come from?

idrometrico (Italian) comes from Italian idrometria, from Italian -metria, from Latin -metria, from Ancient Greek -μετρία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

idrometrico (Italian): hydrometric

Definitions

hydrometric

Ancestry of “idrometrico”, step by step

Step	Language	Word	Meaning
1	Italian	idrometria	hydrometry
2	Italian	-metria	-metry
3	Latin	-metria	-metry
4	Ancient Greek	-μετρία	measurement
5	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
6	Proto-Indo-European	-íh₂	—
7	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Italian -metria →