Where does “worein” come from?

worein (German) comes from German Rein, from Middle High German reine, from Old High German reini, from Proto-West Germanic hrainī, from Proto-Germanic hrainiz, from Proto-Indo-European króy-n-is, from Proto-Indo-European krey- — to sift, separate, divide.

Ancestry of “worein”, step by step

worein traces back through two separate lines of ancestry.

via German Rein

StepLanguageWordMeaning
1GermanReinpure, clear, plain
2Middle High Germanreine—
3Old High Germanreini—
4Proto-West Germanichrainīclean; pure
5Proto-Germanichrainizclean, not dirty; pure; innocent
6Proto-Indo-Europeankróy-n-is—
7Proto-Indo-Europeankrey-to sift, separate, divide

via German wô

StepLanguageWordMeaning
1Germanwôwhere at what place
2Middle High Germanwā—
3Old High Germanwārid; true
4Proto-West Germanicwārtrue, reliable
5Proto-Germanicwēraztrue; reliable; friendly; kind
6Proto-Indo-EuropeanwiHrósman; husband; warrior, hero
7Proto-Indo-Europeanweyh₁-to chase, pursue; to suppress, persecute
Every word from Proto-Indo-European krey- →Every word from Proto-Indo-European króy-n-is →Every word from Proto-Germanic hrainiz →