ταχυπειθής
From LSJ
τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars
English (LSJ)
ές,
A soon persuaded, credulous, Theoc.2.138, 7.38, Nonn.D.22.79. II obeying quickly or easily, ἀνέμων ῥιπή Tryph. 528.