Where does “contratenore” come from?

contratenore (Italian) comes from Italian tenore, from Latin tenor, from Latin -or, from Proto-Italic -ōs, from Proto-Indo-European -ōs, from Proto-Indo-European -oss, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

Ancestry of “contratenore”, step by step

contratenore traces back through two separate lines of ancestry.

via Italian tenore

StepLanguageWordMeaning
1Italiantenoretone; tenor; standard
2Latintenora holding on, continuance, course, career,...
3Latin-orused to form a third-declension masculine...
4Proto-Italic-ōsCreates masculine action nouns or result nouns...
5Proto-Indo-European-ōsCreates masculine and feminine action nouns or...
6Proto-Indo-European-oss
7Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

via Italian contra

StepLanguageWordMeaning
1ItaliancontraObsolete form of contro; third-person singular...
2Latincontrāagainst
3Latinubīwhere? in what place?, in which place?
4Latincubī
5Proto-Italic*kʷuðeiwhere
Every word from Proto-Indo-European -osEvery word from Latin -orEvery word from Latin tenor