STYGIAN Meaning of STYGIAN in English [sty.gian] adj, often cap [L stygius, fr. Gk stygios, fr. Styg-, Styx Styx] (1566) 1: of or relating to the river Styx 2: extremely dark, gloomy, or forbidding Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012