The story
- Proto-Indo-European*pénkʷe
- Proto-Hellenic*pénkʷe
- Ancient Greekπέντε (pénte)
- Ancient Greekπεντᾰ- (pentă-)
- Englishpenta-
- Englishchloro-
- Proto-Indo-European*bʰeh₂-
- Proto-Indo-European*bʰh₂nyéti
- Proto-Hellenic*pʰáňňō
- Ancient Greekφαίνω (phaínō)
- Frenchphène
- Englishphenol
- English todaypentachlorophenol
Etymology from Wiktionary, CC BY-SA 4.0.