κοιλόφωνος
From LSJ
ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly
English (LSJ)
ον,
A hollowvoiced, Hsch.s.v. ληκυθιστής. Adv. -νως, λαρυγγίζειν Phld.Rh.1.200 S.
German (Pape)
[Seite 1467] mit hohler Stimme, Hesych. v. ληκυθιστής.