ἐνασπιδοῦσθαι
From LSJ
Γύμναζε παῖδας· ἄνδρας οὐ γὰρ γυμνάσεις → Exerce pueros: non exercebis virum → Mit Kindern übe, denn mit Männern ist's zu spät
Greek > English (Woodhouse Verbs Reversed)
(see also: ἐνασπιδόομαι) arm oneself with a shield, fit oneself with a shield