The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*trísinflu.
- Proto-Indo-European*dwís
- Ancient Greekδιά (diá)
- Ancient Greekδῐᾰ- (dĭă-)
- Proto-Indo-European*bʰeh₂-
- Proto-Indo-European*bʰh₂nyéti
- Proto-Hellenic*pʰáňňō
- Ancient Greekφαίνω (phaínō)
- Ancient Greekδῐᾰφαίνω (dĭăphaínō)
- Ancient Greekδῐᾰφᾰνής (dĭăphănḗs)
- Medieval Latindiaphanus
- Middle Frenchdiaphane
- English todaydiaphane
Borrowed from Middle French diaphane, from Medieval Latin diaphanus (“transparent”), borrowed from Ancient Greek δῐᾰφᾰνής (dĭăphănḗs), from δῐᾰφαίνω (dĭăphaínō, “to shine; to be manifest”) + -ής (-ḗs, adjectival suffix). By surface analysis, dia- + -phane.
Etymology from Wiktionary, CC BY-SA 4.0.