catch out, find out - trap; especially in an error or in a reprehensible act; "He was caught out"; "She was found out when she tried to cash the stolen checks"

discover, find - make a discovery, make a new finding; "Roentgen discovered X-rays"; "Physicists believe they found a new elementary particle"

sense - detect some circumstance or entity automatically; "This robot can sense the presence of people in the room"; "particle detectors sense ionization"

instantiate - find an instance of (a word or particular usage of a word); "The linguists could not instantiate this sense of the noun that he claimed existed in a certain dialect"

trace - discover traces of; "She traced the circumstances of her birth"

see - observe as if with an eye; "The camera saw the burglary and recorded it"

sight - catch sight of; to perceive with the eyes; "he caught sight of the king's men coming over the ridge"

say, state, tell - express in words; "He said that he wanted to marry her"; "tell me what is bothering you"; "state your opinion"; "state your name"

comment, point out, remark, notice - make or write a comment on; "he commented the paper of his colleague"

bird, birdwatch - watch and study birds in their natural habitat

watch - look attentively; "watch a basketball game"

monitor, ride herd on, supervise - keep tabs on; keep an eye on; keep under surveillance

reconnoiter, reconnoitre, scout - explore, often with the goal of finding something or somebody

track - observe or plot the moving path of something; "track a missile"

accept - consider or hold as true; "I cannot accept the dogma of this church"; "accept an argument"

lionise, lionize, celebrate - assign great social importance to; "The film director was celebrated all over Hollywood"; "The tenor was lionized in Vienna"

tolerate - recognize and respect (rights and beliefs of others); "We must tolerate the religions of others"

commemorate, mark - mark by some ceremony or observation; "We marked the anniversary of his death"

mourn - observe the customs of mourning after the death of a loved one

solemnise, solemnize - observe or perform with dignity or gravity; "The King solemnized this day of morning"

check, check into, check out, check over, check up on, suss out, go over, look into - examine so as to determine accuracy, quality, or condition; "check the brakes"; "Check out the engine"

trace, follow - follow, discover, or ascertain the course of development of something; "We must follow closely the economic development is Cuba" ; "trace the student's progress"

keep tabs on - keep a record on or watch attentively; "The government keeps tabs on the dissidents"

guard - to keep watch over; "there would be men guarding the horses"

invigilate, proctor - as of students taking an exam, to prevent cheating

make good - act as promised; "make good on promises"