Ἐκπλαγεῖς

[Meaning they who are] full of astonishment.¹ Polybios [writes]: "the Libyans, astonished by the unexpectedness of it, turned and fled."² And elsewhere: "they were so astonished and fearful as to the future [...]."³
Also [sc. attested is] e)kplagei=s in the feminine, meaning marvelous.⁴
"Shepherds camping in the fields encountered an astonishing display of light."⁵