καλλίφθογγος
From LSJ
αἰὼν παῖς ἐστι παίζων, πεσσεύων∙ παιδός η βασιληίη → time is a child playing draughts; the kingship is a child's | a life-time is a child playing, playing checkers: the kingship belongs to a child | a whole human life-time is nothing but a child playing, playing checkers: the kingship belongs to a child | lifetime is a child at play, moving pieces in a game; kingship belongs to the child
English (LSJ)
ον,
A beautiful-sounding, ᾠδαί E.Ion169 (lyr.); ἱστοί Id.IT222 (lyr.).
German (Pape)
[Seite 1311] schön tönend; ᾠδαί Eur. Ion 169; κιθάρα Herc. Fur. 350; auch ἱστοί, I. T. 221.