Where does “Viertelfinal” come from?

Viertelfinal (German) comes from German final, from Latin fīnālis, from Latin -ālis, from Proto-Italic -ālis — forms relational adjectives.

Ancestry of “Viertelfinal”, step by step

Viertelfinal traces back through two separate lines of ancestry.

via German final

StepLanguageWordMeaning
1Germanfinalfinal; expressing purpose; final; conclusive;...
2LatinfīnālisOf or pertaining to boundaries
3Latin-ālis
4Proto-Italic-ālisforms relational adjectives

via German Viertel

StepLanguageWordMeaning
1GermanViertelquarter; Clipping of Stadtviertel; quarter,...
2Old High Germanfiorteil
Every word from Proto-Italic -ālisEvery word from Latin -ālisEvery word from Latin fīnālis