Ancient Greek lemma · Strong’s G2657

κατανοέω

katanoeo · /kat-an-o-eh'-o/ — “understand”

observe well, understand, apprehend; to be grasped and; accepted; is understood; perceive; the percipient to the perceived; learn; consider; look at, view; to be in one's right mind, in one's senses

Derivation: from κατά (kata, down) and νοέω (noeō, to perceive)