Where does “Unterzahl” come from?

Unterzahl (German) comes from German zahl, from Latvian zāle, from German Saal, from Middle High German sal, from Old High German sal, from Proto-West Germanic sāli, from Proto-Germanic saliz, from Proto-Indo-European sol- — whole.

Ancestry of “Unterzahl”, step by step

Unterzahl traces back through two separate lines of ancestry.

via German zahl

StepLanguageWordMeaning
1Germanzahlsingular imperative of zahlen; first-person...
2Latvianzālegrass; weed; herb
3GermanSaalhall or large room
4Middle High Germansal
5Old High Germansalhouse, hall; dwelling, house, entrance hall;...
6Proto-West Germanicsālihappiness, prosperity; proper, appropriate time
7Proto-Germanicsalizhouse; dwelling; hall; room
8Proto-Indo-Europeansol-whole

via German Unter

StepLanguageWordMeaning
1GermanUnterjack, knave
2Middle High Germanunder
3Old High Germanuntarunder
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European sol-Every word from Proto-Germanic salizEvery word from Proto-West Germanic sāli