understand
verb
1 he couldn't understand anything we said to him:
comprehend, apprehend, grasp, see, take in, perceive, discern, make out, puzzle out, recognize, keep up with, master, get to know, follow, fathom, get to the bottom of, penetrate, divine, interpret, unravel, decipher, see the light about, envisage;
informal get the hang of, get the drift of, catch on to, latch on to, tumble to, crack, make head or tail of, figure out, dig, get, get one's head around, wrap one's mind around, see daylight, get the picture, get the message;
British, informal twig, suss out, suss;
North American, informal savvy;
rare cognize.
▷antonyms misunderstand, misinterpret.
understand Oxford Dictionary of English