G1620–ἐκτίθημι–ektithēmi

And when he was cast out, the daughter of Pharaoh took him up, and brought him up for herself [supplied: to be] for a son.

ἐκτεθέντος ektethentos “When was being exposed”

But Peter began and set forth [supplied: the matter] to them in order, saying,

ἐξετίθετο exetitheto “he was explaining [it]”

And *he* began to speak boldly in the synagogue. And Aquila and Priscilla, having heard him, took him to [supplied: them] and unfolded to him the way of God more exactly.

ἐξέθεντο exethento “they expounded”

And having appointed him a day many came to him to the lodging, to whom he expounded, testifying of the kingdom of God, and persuading them concerning Jesus, both from the law of Moses and the prophets, from early morning to evening.

ἐξετίθετο exetitheto “he was expounding”