Where does “πυρέττω” come from?

πυρέττω (Ancient Greek) comes from Ancient Greek Πυρετός, from Ancient Greek πῦρ, from Proto-Indo-European péh₂wr̥ — bonfire; spelt.

Ancestry of “πυρέττω”, step by step

StepLanguageWordMeaning
1Ancient GreekΠυρετόςRiver Pyretus; Prut River, nowadays flowing through Ukraine, Romania and Moldova
2Ancient Greekπῦρa fire; lightning; a fever
3Proto-Indo-Europeanpéh₂wr̥bonfire; spelt
Every word from Proto-Indo-European péh₂wr̥ →Every word from Ancient Greek πῦρ →Every word from Ancient Greek Πυρετός →