ἀγωνίδαται
From LSJ
ἔξαψις σφοδρὰ μετὰ πολλῆς βίας πίπτουσα ἐπὶ γῆς → a violent flare-up falling on the ground with great force, thunder and lightning
French (Bailly abrégé)
3ᵉ pl. pf. Pass. ion. de ἀγωνίζομαι (p. *ἠγωνιζ-νται).
Greek Monotonic
ἀγωνίδαται: βλ. ἀγωνίζομαι Β.
Russian (Dvoretsky)
ἀγωνίδαται: Her. 3 л. pl. pf. pass. к ἀγωνίζομαι.