σκυθρωπ-ός · skythrōp-os — LSJ
of sad, angry countenance, sullen, with greater severity
of sad or angry countenance, sullen, E. Med. 271, Hipp. 1152; ὄμμα καὶ πρόσωπον Id. Ph. 1333; σ. τοῖς ξένοις Id. Alc. 774; ἐπὶ τοῖς κακοῖς X. Mem. 3.10.4; opp. ἱλαρός, φαιδρός, ib. 2.7.12, 3.10.4; also of affected gravity, D. 45.68, Aeschin. 3.20: τὸ σ., = sq., E. Alc. 797, cf. Pl. Smp. 206d. Adv., -πῶς ἔχειν X. Mem. 2.7.1: Comp. -ότερον with greater severity, J. BJ 6.2.7.
II gloomy, sad, melancholy
of things, gloomy, sad, melancholy, γῆρας E. Ba. 1252; ὁδός Archyt. ap. Stob. 3.1.105 (Comp.); μέλη Paus. 10.7.5; ἡμέρα Plu. Dem. 30 (Sup.).
2 sad-coloured, dark and dull
of colour, sad-coloured, dark and dull, of the river Μέλας, Him. Or. 23.22; of wine, ib. 9.4.