Where does “fertugur” come from?

fertugur (Icelandic) comes from Icelandic fer-, from Old Norse fer-, from Proto-Germanic feþur-, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

fertugur (Icelandic): forty years old; forty, quadragenarian

Definitions

  1. forty years old; forty, quadragenarian

Ancestry of “fertugur”, step by step

StepLanguageWordMeaning
1Icelandicfer-four, quadri-, tetra-; square
2Old Norsefer-—
3Proto-Germanicfeþur-four, pertaining to four
4Proto-Indo-Europeankʷetwóresfour
5Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe- →Every word from Proto-Indo-European kʷetwóres →Every word from Icelandic fer- →