The story
- Proto-Indo-European*wed-
- Proto-Indo-European*wódr̥
- Proto-Hellenic*údōr
- Ancient Greekῠ̔́δωρ (hŭ́dōr)
- Proto-Indo-European*h₂erǵ-
- Proto-Indo-European*h₂érǵ-u-ros or *h₂érǵ-wr̥ ~ h₂r̥ǵ-wén-s
- Ancient Greekᾰ̓́ργῠρος (ắrgŭros)
- Ancient Greekὑδράργυρος (hudrárguros)
- Latinhydrargyrus
- New Latinhydrargyrum
- English todayhydrargyrum
From New Latin hydrargyrum (“mercury”). By surface analysis, hydr- + argyr- + -um.
Etymology from Wiktionary, CC BY-SA 4.0.