Where does “phthore” come from?

phthore (French) comes from Ancient Greek φθορά, from Ancient Greek φθείρω, from Proto-Hellenic kʷʰtʰéřřō, from Proto-Indo-European dʰgʷʰér-ye-ti, from Proto-Indo-European dʰgʷʰer- — flow, diverge; perish.

Ancestry of “phthore”, step by step

StepLanguageWordMeaning
1Ancient Greekφθοράdestruction, ruin; passing out of existence,...
2Ancient GreekφθείρωI destroy; I ruin, spoil
3Proto-Hellenickʷʰtʰéřřō
4Proto-Indo-Europeandʰgʷʰér-ye-ti
5Proto-Indo-Europeandʰgʷʰer-flow, diverge; perish

Words derived from “phthore

Every word from Proto-Indo-European dʰgʷʰer-Every word from Proto-Indo-European dʰgʷʰér-ye-tiEvery word from Proto-Hellenic kʷʰtʰéřřō