σκληρός
Ἀναξαγόρας δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Anaxagoras used to say that we have two teachers for death: the time before we were born and sleep | Anaxagoras said that there are two rehearsals for death: the time before being born and sleep
English (LSJ)
ά, όν, also Dor., Pi.O.7.29, Epich.[288], hyperdor. σκλᾱρός Ti.Locr.104c:—
A hard, opp. μαλακός in all senses: I hard to the touch, ξύλον σ. ἢ μαλακόν Thgn.1194; ἐλαία Pi.l.c.; γῆ A.Pers.319, cf. X.Oec.16.11; κοίτη Pl.Lg.942d, etc. 2 of sound, harsh, σκληρὸν ἐβρόντησε Hes.Th.839; βρονταί Hdt.8.12; ἡ φωνὴ σκληροτέρα Arist.Aud.801b38, al. 3 of taste and smell, harsh, bitter, σ. ὕδατα (springing from a rocky soil) Hp.Aër.1; so σκληρότατος ἀὴρ καὶ τόπος Plb.4.21.5; of wine, dry, Ar.Fr.579, Dsc. Alex.Praef.; ὀσμαί Thphr.CP6.14.12 (Comp.): metaph., σ. φράσις D.H.Pomp.2. 4 stiff, unyielding, opp. ὑγρός (lithe and supple), τιτθία σ. καὶ κυδώνια Ar.Ach.1199; σκληρότεροι μαστοί Arist.PA688a27; σκέλη X.Eq.1.6; τί τὸ ὑγρὸν τοῦ χαλινοῦ καὶ τί τὸ σ. ib.10.10; of the hair (cf. σκληρόθριξ), Arist.HA517b11 (Comp.), al.; σ. δέρμα, σάρξ, Id.PA665a2, Phgn.806b22, etc.; of persons, Pl.Tht.162b, Smp.196a, Plu.Ages.13, Luc.Salt.21; of dogs, X.Cyn.3.2; τράχηλος ib.5.30; οἱ τὸ σῶμα σ. Arist.Pr.873a34, al. 5 κοιλίη σ. costive, Hp.Aph. 3.25, cf. Arist.PA670b9. 6 of light, strong, ἐν σ. αὐγῇ ἢ μαλακῇ Id.Col.793b17. 7 of a wind, strong, Ep.Jac.3.4, Poll.1.110, Ael.NA9.57. II metaph., 1 of things, hard, austere, μὴ τὰ μαλακὰ μῶσο, μὴ τὰ σ. ἔχῃς Epich. l.c.; τροφή S.OC1615; δίαιται E.Fr.525.5; βίος Men.522; τὰ σ. hard words, S.OC1406; σ. συμφοραί E.Fr.684.3; σκληρὰ μαλθακῶς λέγων S.OC774; τόνος ἀπηνὴς καὶ σ. Plu.Phoc.2; τὸ σ. = σκληρότης, ἡ δίαιτα . . ὑπερβάλλει ἐπὶ τὸ σ. Arist.Pol.1270b33. 2 of persons, harsh, austere, cruel, stubborn, S.Fr.24.7, Pl.Tht.155e, Ti.Locr. l.c.; σ. ἀοιδός, of the Sphinx, S.OT36; σ. γὰρ αἰεί E.Alc.500; ὦ σ. δαῖμον Ar.Nu. 1264; τοὺς τρόπους σκληρός Id.Pax350; ἄγροικοι καὶ σ. Arist.EN1128a9; σ. ψυχή S.Aj.1361, Tr.1260(anap.); σ. ἄγαν φρονήματα Id.Ant.473; ἦθος Pl.Smp.195e; σ. θράσος stubborn courage, E.Andr.261. III Adv., -ρῶς καθῆσθαι, i.e. on a hard seat, Ar.Eq.783; εὐνάζεσθαι X. Cyn.12.2. 2 hardly, with difficulty, E.Fr.282.9. 3 harshly, obstinately, σ. διαμάχεσθαι Pl.Lg.629a; ἀπειλεῖν ib.885d; τὰ μαλακὰ σ. καὶ τὰ σκληρὰ μαλακῶς λέγειν Arist.Rh.1408b9; σ. αὐλεῖν Id.Aud. 803a20. (Prob. cogn. with σκέλλω.)