Where does “derren” come from?

derren (Middle High German) comes from Old High German derren, from Proto-Germanic *þarzijaną, from Proto-Indo-European torséyeti, from Proto-Indo-European -éyeti, from Proto-Indo-European -yeti — Creates transitive imperfective verbs from roots.

Ancestry of “derren”, step by step

StepLanguageWordMeaning
1Old High Germanderren
2Proto-Germanic*þarzijanąto cause to dry
3Proto-Indo-Europeantorséyetito make dry, to cause to dry
4Proto-Indo-European-éyetiForms causative imperfective verbs from roots;...
5Proto-Indo-European-yetiCreates transitive imperfective verbs from roots

Words derived from “derren

Every word from Proto-Indo-European -yetiEvery word from Proto-Indo-European -éyetiEvery word from Proto-Indo-European torséyeti