καταμανθάνω · katamanthanō — LSJ
observe well, examine closely, τὴν στρατιήν Hdt. 7.146; τὸν Οἰνέα Timocl. 6.16, cf. 10; τὸ τραῦμα Plu. Dio 34; look to, inspect, τὸν ἐλαιῶνα PFay. 114.11 (100 A.D.); κ. ἤν που . . X. Oec. 12.3.
learn, acquire knowledge of, Pl. Tht. 198d, etc.; ὑπακούειν how to obey, v.l. in X. Oec. 13.7.
perceive with the senses, observe, Arist. Pr. 960a7: more commonly with the mind, understand, perceive, observe, οὐκ ὀρθῶς κ. Pl. Prm. 128a; εἰ ἄρα μου καταμανθάνετε ὃ λέγω Id. Lg. 689c; ἐκ τῶν νόμων κ. τοὺς λόγους εἰ ὀρθῶς . . Antipho 5.14; κ. ὁπόσα θνητῇ φύσει δυνατά Pl. Epin. 986c; κ. ὅτι . . Hp. l.c.; ῥᾴδιον τοῦτο κ., ὅτι . . Arist. Pol. 1285a1: pf., to be aware, Λυκοῦργον -μεμάθηκας ὅτι . . X. Mem. 4.4.15: c. acc. et part., κ. πολλοὺς ἔχοντάς τι Id. Cyr. 1.1.1; καταμαθόντες μιν ἀγοράζοντα H
consider, τι Id. An. 3.1.44; ὅτι . . Id. Cyr. 7.5.80, etc.