Where does “fjorten” come from?
fjorten (Norwegian Bokmål) comes 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 Bokmål): fourteen
Ancestry of “fjorten”, step by step