ἄπτιλος
From LSJ
νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)
English (LSJ)
ον, unfledged, Jul.Ep.191.
German (Pape)
[Seite 340] (πτίλον), ungefiedert, λειός Hesych.
Spanish (DGE)
-ον
que no tiene plumas las crías del águila, Iul.Ep.191.383c, cf. Hsch.