From Proto-Italic *wedro- (“glass”), from Proto-Indo-European *wed-ro- (“water-like”), from *wódr̥ (“water”), whence also Latin unda (“water”). Compare semantic parallel in Middle Iranian where "glass" is also derived from "water": Middle Persian ʾp̄ḵynk' (ābgēnag, “crystal, glass”), compound of ʾp̄ (āb, “water”) + -kyn' (-gēn) + -k' (-ag) > Persian آبگینه (ābgīna, “glass”), Sogdian ʾʾpkyn-, ʾʾpkynʾk (“crystal”), Ossetian авг (avg) (Iron) / авгæ (avgæ, “glass; bottle”) (Digor). Compare also Old Armenian ապակի (apaki) and Hungarian üveg (“glass; bottle”). The plant and its dye were named after the color of glass in antiquity.
vitrum n (genitive vitrī); second declension
- Mihi dicendum est de materia, ex qua vitrum conficitur.
- a woad; a plant used for dying blue
- woad; a blue dye used by the Britons made from that plant
- Michiel de Vaan (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden, Boston: Brill Academic Publishers, page 684
- Andrew Sihler, New Comparative Grammar of Greek and Latin, OUP, 1995, page 212