Where does “krǫptr” come from?

krǫptr (Old Norse) comes from Proto-Germanic kraftuz, from Proto-Germanic -þuz, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “krǫptr”, step by step

StepLanguageWordMeaning
1Proto-Germanickraftuzstrength, power
2Proto-Germanic-þuzForms result nouns from verb roots, usually from...
3Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tus →Every word from Proto-Germanic -þuz →Every word from Proto-Germanic kraftuz →