Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.wash off, “ἀπονίψαντες . . βρότον ἐξ ὠτειλῶν” Od.24.18), cf. Il.7.425 (tm.):—Med., wash off from oneself, ἱδρῶ πολλὸν ἀπονίζοντο θαλάσσῃ ib.10.572.

II. wash clean, esp. of the hands and feet, τὴν ἀπονίζουσα φρασάμην I perceived it (the scar) as I was washing his feet, Od.23.75; “ὅταν ἡ θυγάτηρ μ᾽ ἀπονίζῃ καὶ τὼ πόδ᾽ ἀλείφῃ” Ar.V.608, cf. Men.Georg.60; “ἓ μὲν ἔφη ἀ. τὸν παῖδα” Pl.Smp. 175a:—Med., χρῶτ᾽ ἀπονίπτεσθαι wash one's body, v.l. in Od.18.179, cf. 172; χεῖράς τε πόδας τε ib.22.478: abs., “οἷον εἴ τις εἰς πηλὸν ἐμβὰς πηλῷ -νίζοιτο” Heraclit.5; wash one's hands (esp. after meals, cf. Ar.Byz. ap. Ath.9.408f), Hp.Mul.1.89; “ἐγὼ μὲν ἀποτρέχων ἀπονίψομαι” Ar.Av.1163; “ἀπονίψασθαι δοτέον” water to wash with, Alex.250, cf. Antiph.136; so in pf. Pass., “ἀπονενίμμεθ᾽” Ar.V.1217; “ἀπονενιμμένος” Id.Ec.419; also in late Prose, v. supr.; “τῆς κρήνης -νιψάμενος” Alciphr.3.1; but “ἀπονίψασθαι τὸ πρόσωπον ἀπὸ τᾶς κράνας” IG4.951.63 (Epid.).

2. rarely of things, “ἀ. τὴν κύλικα” Pherecr.41.