ἀνδρὸς σπλάγχνον ἐκμαθεῖν → learn a man's heart, learn a man's inward nature
v. trans.
P. and V. μνησθῆναι (aor. pass. μιμνήσκειν) (acc. or gen.), μνημονεύειν (acc. or gen.); see remember.