Where does “hwealfnian” come from?

hwealfnian (Old English) comes from Old English hwealf, from Proto-Germanic *hwalbaz — curved, vaulted.

Ancestry of “hwealfnian”, step by step

StepLanguageWordMeaning
1Old Englishhwealfvault, arch; arched, vaulted, hollow, concave,...
2Proto-Germanic*hwalbazcurved, vaulted
Every word from Proto-Germanic *hwalbaz →Every word from Old English hwealf →