Englishobserve
verb
1 she observed that almost all the chairs were occupied:
notice, see, note, perceive, discern, remark, spot, detect, discover, distinguish, make out;
literary espy, descry, behold.
▷antonyms overlook, fail to see.
2 Rob stood in the hall, from where he could observe the happenings on the street:
watch, see, look at, eye, contemplate, view, survey, regard, witness, keep an eye on, scrutinize, keep under observation, keep watch on, keep under surveillance, monitor, keep under scrutiny, watch like a hawk, keep a weather eye on, spy on, check out, reconnoiter;
informal get a load of, keep tabs on, keep a tab on, case, keep a beady eye on;
British, informal clock, take a dekko/butcher's/gander/shufti at, recce;
North American, informal eyeball;
archaic twig;
rare surveil.
3 “You look tired,” she observed:
comment, remark, say, mention, note, declare, announce, state, utter, pronounce, interpose, interject;
formal opine.