Where does “Verkalkulierer” come from?

Verkalkulierer (German) comes from German verkalkulieren, from German kalkulieren, from Latin calculāre, from Latin calculus, from Latin -ulus, from Proto-Italic -olos, from Proto-Italic -elos, from Proto-Indo-European -e-lós — Forms agent nouns from verbal roots.

Ancestry of “Verkalkulierer”, step by step

StepLanguageWordMeaning
1Germanverkalkulierento miscalculate
2Germankalkulierento calculate
3Latincalculāre
4Latincalculusdiminutive of calx; pebble, stone; reckoning,...
5Latin-ulusUsed to form a diminutive of a noun, indicating...
6Proto-Italic-olos
7Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
8Proto-Indo-European-e-lós
9Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lósEvery word from Latin -ulusEvery word from Latin calculus