Where does “Offenlasser” come from?

Offenlasser (German) comes from German offenlassen, from German offen, from Middle High German offen, from Old High German offan, from Proto-West Germanic *opan, from Proto-Germanic upanaz, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “Offenlasser”, step by step

StepLanguageWordMeaning
1Germanoffenlassento leave undecided
2Germanoffenopen; frank, candid; honest, sincere
3Middle High Germanoffen—
4Old High Germanoffanopen; obvious; clear
5Proto-West Germanic*opanopen
6Proto-Germanicupanazopen
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-—
Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Germanic upanaz →