G1231–διαγινώσκω–diaginōskō

Now therefore do ye with the council make a representation to the chiliarch so that he may bring him down to you, as about to determine more precisely what concerns him, and we, before he draws near, are ready to kill him.

διαγινώσκειν diaginōskein “to examine”

And Felix, knowing accurately the things concerning the way, adjourned them, saying, When Lysias the chiliarch is come down I will determine your affair;

διαγνώσομαι diagnōsomai “I will examine”