Stygias

Stygias is a Latin form of Stygius, meaning “Stygian, of the Styx; of the underworld”. It is the accusative plural feminine adjective.

Found 49 times in the Latin texts on Socratos.

Where it is used

Vergil, Aeneid 6.374: Tu Stygias inhumatus aquas amnemque severum

All forms of Stygius (declension table)

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.