δήλωσιν ποιούμενος ὅτι ὁ ἐντυγχάνων τοῖς τε λίθοις καὶ τοξεύμασι διεφθείρετο → intimating that it was a mere matter of chance who was hit and killed by stones and bow-shots
SourceFrench (Bailly abrégé)
v. ἐκπίπτω.
Russian (Dvoretsky)
ἐξέπεσον: aor. 2 к ἐκπίπτω.