βρονταῖος
From LSJ
ἔχεις δὲ τῶν κάτωθεν ἐνθάδ᾽ αὖ θεῶν ἄμοιρον, ἀκτέριστον, ἀνόσιον νέκυν → and you have kept here something belonging to the gods below, a corpse deprived, unburied, unholy | but keepest in this world one who belongs to the gods infernal, a corpse unburied, unhonoured, all unhallowed
English (LSJ)
α, ον,
A thundering, Ζεύς Arist.Mu. 401a17, Orph.H.15.9; ὕδωρ β. thunder-rain, Hp.Epid.6.4.17.