The story
- Proto-Indo-European*kʷetwóres
- Proto-Hellenic*kʷétwores
- Ancient Greekτέσσᾰρες (téssăres)
- Ancient Greekτετρᾰ- (tetră-)
- Englishtetra-
- Proto-Indo-European*déḱm̥
- Proto-Hellenic*dékə
- Ancient Greekδέκᾰ (dékă)
- Ancient Greekδεκάς (dekás)
- Late Latindecas
- Frenchdéca-
- Englishdeca-
- Englishtetradeca-
- English todaytetradecanal
From tetradeca- (“fourteen”) + -n- + -al (“aldehyde”).
Etymology from Wiktionary, CC BY-SA 4.0.