ἐκμανθάνω
From LSJ
ὅτι χρὴ τοῦ μέλιτος ἄκρῳ δακτύλῳ, ἀλλὰ μὴ κοίλῃ χειρὶ γεύεσθαι → that honey should be tasted with the fingertip and not by the handful
English (LSJ)
A learn thoroughly, and, in past tenses, to have learnt thoroughly, know full well, ἐ. τὴν [Ἑλλάδα] γλῶσσαν Hdt.2.154; ἀνδρὸς ψυχήν S.Ant.175; ἐ. τι ἀπό τινος A.Pr.256; ἔκ τινος Pl.Ax.371a; παρά τινος S.OT286; τοῦ θεοῦ τί πρακτέον ib.1439, cf. OC114, Ar.Ec. 244; ἐ. ὅτι.. Hdt.3.134. II examine closely, search out, Id.7.28, E.IT667, X.Cyr.1.6.40. III learn by heart, ὅλους ποιητάς Pl. Lg.811a, cf.Aeschin.3.135; ᾄσματα Thphr.Char.27.7; Σαπφοῦς τἀρωτικά Epicr.4; Διονυσίου δράματα Ephipp.16; ἵνα πολλάκις ἀκούοντες τῶν ἐπῶν ἐκμανθάνωμεν τὴν ἔχθραν Isoc.4.159.