πτερύσσομαι

A. flutter, flap the wings like a cock crowing, Babr. 65.6, Luc. VH 2.41, Ael. NA 7.7, etc.; ἐπτερύσσετο shd. perh. be restd. for ἀπτ‐ in Archil. 49 Diehl.

II. metaph., triumph, exult, Diph. 61.6.

2. become full-fledged, spread one's wings for flight, of the soul, Ph. 2.32, al.