Antonyms of verb know

1 of 11 senses of know

Sense 1
know, cognize, cognise -- (be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about; "I know that the President lied to the people"; "I want to know who is winning the game!"; "I know it's time")
       Antonym of ignore (Sense 5)
      => ignore -- (be ignorant of or in the dark about)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb know

11 senses of know

Sense 1
know, cognize, cognise -- (be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about; "I know that the President lied to the people"; "I want to know who is winning the game!"; "I know it's time")

Sense 2
know -- (know how to do or perform something; "She knows how to knit"; "Does your husband know how to cook?")

Sense 3
know -- (be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt; "I know that I left the key on the table"; "Galileo knew that the earth moves around the sun")

Sense 4
know -- (be familiar or acquainted with a person or an object; "She doesn't know this composer"; "Do you know my sister?"; "We know this movie"; "I know him under a different name"; "This flower is known as a Peruvian Lily")

Sense 5
know, experience, live -- (have firsthand knowledge of states, situations, emotions, or sensations; "I know the feeling!"; "have you ever known hunger?"; "I have lived a kind of hell when I was a drug addict"; "The holocaust survivors have lived a nightmare"; "I lived through two divorces")
       => experience, see, go through -- (go or live through; "We had many trials to go through"; "he saw action in Viet Nam")

Sense 6
acknowledge, recognize, recognise, know -- (accept (someone) to be what is claimed or accept his power and authority; "The Crown Prince was acknowledged as the true heir to the throne"; "We do not recognize your gods")
       => accept -- (consider or hold as true; "I cannot accept the dogma of this church"; "accept an argument")

Sense 7
know -- (have fixed in the mind; "I know Latin"; "This student knows her irregular verbs"; "Do you know the poem well enough to recite it?")

Sense 8
sleep together, roll in the hay, love, make out, make love, sleep with, get laid, have sex, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk -- (have sexual intercourse with; "This student sleeps with everyone in her dorm"; "Adam knew Eve"; "Were you ever intimate with this man?")
       => copulate, mate, pair, couple -- (engage in sexual intercourse; "Birds mate in the Spring")

Sense 9
know -- (know the nature or character of; "we all knew her as a big show-off")
       => recognize, recognise, realize, realise, agnize, agnise -- (be fully aware or cognizant of)

Sense 10
know -- (be able to distinguish, recognize as being different; "The child knows right from wrong")
       => distinguish, separate, differentiate, secern, secernate, severalize, severalise, tell, tell apart -- (mark as different; "We distinguish several kinds of maple")

Sense 11
know -- (perceive as familiar; "I know this voice!")
       => remember, retrieve, recall, call back, call up, recollect, think -- (recall knowledge from memory; have a recollection; "I can't remember saying any such thing"; "I can't think what her last name was"; "can you remember her phone number?"; "Do you remember that he once loved you?"; "call up memories")

Antonyms of adj known

1 sense of known

Sense 1
known (vs. unknown) -- (apprehended with certainty; "a known quantity"; "the limits of the known world"; "a musician known throughout the world"; "a known criminal")

unknown (vs. known) -- (not known; "an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source")
        => chartless, uncharted, unmapped -- ((of unknown regions) not yet surveyed or investigated; "uncharted seas")
        => little-known -- (unknown to most people)
        => unbeknown (predicate), unbeknownst (predicate) -- ((usually used with `to') occurring or existing without the knowledge of; "a crisis unbeknown to me"; "she had been ill for months, unbeknownst to the family")
        => undiagnosed -- (eluding diagnosis; "undiagnosed disease")
        => undiscovered, unexplored -- (not yet discovered; "undiscovered islands")
        => unheard-of -- (previously unknown; "a first novel by an unheard of writer"; "developments on an unheard-of scale")
        => unidentified -- (not yet identified; "an unidentified species"; "an unidentified witness")

Similarity of adj known

1 sense of known

Sense 1
known (vs. unknown) -- (apprehended with certainty; "a known quantity"; "the limits of the known world"; "a musician known throughout the world"; "a known criminal")
       => best-known -- (most familiar or renowned; "Stevenson's best-known work is probably `Treasure Island'")
       => better-known -- (more familiar or renowned than the other of two; "the better-known book of the two")
       => celebrated, famed, far-famed, famous, illustrious, notable, noted, renowned -- (widely known and esteemed; "a famous actor"; "a celebrated musician"; "a famed scientist"; "an illustrious judge"; "a notable historian"; "a renowned painter")
       => identified -- (having the identity known or established; "the identified bodies were released for burial")
       => legendary -- (so celebrated as to having taken on the nature of a legend; "the legendary exploits of the arctic trailblazers")
       => proverbial -- (widely known and spoken of; "her proverbial lateness"; "the proverbial absentminded professor"; "your proverbial dizzy blonde")
       => well-known -- (widely or fully known; "a well-known politician"; "well-known facts"; "a politician who is well known"; "these facts are well known")
          Also See-> acknowledged#1; familiar#1; glorious#1