Dictionary entry

καταμανθάνω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

κατα-μανθάνω,

[in LXX: Ge 34:1 (ראה), Jb 35:4(5) (שׁוּר), Si 9:5, 8, al.;]

to learn thoroughly, observe well, consider carefully (on distinction bet. κ. and μανθάνω, cf. M, Pr., 117): Mt 6:28.†