Where does “fjorten” come from?
fjorten (Norwegian Nynorsk) comes from Norwegian Bokmål fjorten, from Danish fjorten, from Old Norse fjórtán, from Proto-Germanic fedurtehun, from Proto-Germanic fedwōr, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.
fjorten (Norwegian Nynorsk): fourteen
Ancestry of “fjorten”, step by step