ἀργαίνω
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
A to be white, E.Fr.73, Philod.Scarph.126 (prob.), Opp.C. 3.299:—in Pass., Nonn.D.34.145 (s. v.l.).
Greek (Liddell-Scott)
ἀργαίνω: λευκαίνω, ποιῶ τι λευκόν, «ἀργαίνειν, τὸ λευκαίνειν παρ’ Εὐριπίδῃ ἐν Ἀλκμέωνι» Εὐστ. 1430, (Εὐρ. Ἀποσπ. 74), Ὀππ. Κυνηγ. 3. 299.
Spanish (DGE)
blanquear E.Fr.73, ἀργαίνοντ' ἐλέφαντι que resalta con la blancura del marfil Philod.Scarph.126, cf. Opp.C.3.299.