The story
In reference to the Black Sea, in Ancient Greek called Πόντος Εὔξεινος (Póntos Eúxeinos, “Hospitable Sea”), which is known for anoxic bottom waters.
Etymology from Wiktionary, CC BY-SA 4.0.
euxinic
Today it means: Having restricted hydrologic circulation, leading to stagnant or anaerobic conditions. Full definition →