Where does “rîtera” come from?

rîtera (Old High German) comes from Proto-West Germanic hrīdrā, from Proto-Germanic hrīdrą, from Proto-Germanic hrid-, from Proto-Indo-European krey- — to sift, separate, divide.

Ancestry of “rîtera”, step by step

StepLanguageWordMeaning
1Proto-West Germanichrīdrāsieve
2Proto-GermanichrīdrąAlternative form of *hrīdrǭ
3Proto-Germanichrid-to shake
4Proto-Indo-Europeankrey-to sift, separate, divide
Every word from Proto-Indo-European krey- →Every word from Proto-Germanic hrid- →Every word from Proto-Germanic hrīdrą →