Lexical Definition

‎ἀπονίπτω‎ aponíptō (ap-on-ip'-to) to wash off G:V
from ‎ἀπό‎ and ‎νίπτω‎

wash.

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
ἀπενίψατο he washed Matt.27.24
απονιψαμένη in washing LXX.Prov.30.20
απένιψεν washes LXX.Prov.30.12
απένιψαν they washed LXX.1Kgs.22.38

Abbott-Smith

ἀπο-νίπτω, [in LXX for שׁטף, רחץ, מחה;]
to wash off: mid. (reflex.), τ. χεῖρας, Mt 27:24.†

Abbott-Smith References

Book Refs
Matthew 27:24

Liddell-Scott-Jones

ἀπονίπτω,

later ἀπονευρ-νίπτω[Refs 8th c.BC+], see below:— wash off, ἀπονίψαντες.. βρότον ἐξ ὠτειλῶν[Refs 8th c.BC+]:—middle, wash off from oneself, ἱδρῶ πολλὸν ἀπονίζοντο θαλάσσῃ [Refs]

__II wash clean, especially of the hands and feet, τὴν ἀπονίζουσα φρασάμην I perceived it (the scar) as I was washing his feet, [Refs 8th c.BC+] —middle, χρῶτ᾽ ἀπονίπτεσθαι wash one's body, variant in [Refs 8th c.BC+]; wash one's hands (especially after meals,[Refs 5th c.BC+]water to wash with, [Refs 4th c.BC+]; so in perfect passive, ἀπονενίμμεθ᾽[Refs 5th c.BC+]; also in late Prose, see above; τῆς κρήνης -νιψάμενος[Refs 4th c.AD+]
__II.2 rarely of things, . τὴν κύλικα[Refs 5th c.BC+]