Synonyms and antonyms of Not known or difficult to know in British Thesaurus

secret (adjective)

not known about by many people

private (adjective)

understood by only a few people, not by everyone

personal (adjective)

private and not known or available to most people

strange (adjective)

not familiar or known to you

unknown (adjective)

if something is unknown, people do not know about it or do not know what it is

uncertain (adjective)

not clearly known or understood

hidden (adjective)

if something is hidden, most people do not know about it or understand it

mysterious (adjective)

not recognized or known

anonymous (adjective)

if someone is anonymous, no one knows their name

obscure (adjective)

not known about, or not well known

anonymous (adjective)

used about something that is done, written etc by someone whose name is not known

behind someone’s back ()

if you do something bad or unkind behind someone’s back, you do it without them knowing

behind the scenes ()

not seen or heard by the audience of a film, play etc

chicken-and-egg (adjective)

a chicken-and-egg situation is one where it is impossible to say which of two things happened first or caused the other to happen

dark (adjective)

a dark secret or mystery is kept well hidden, especially because people would not approve if they knew about it

dark (adjective)

a dark place is distant and mysterious because very little information is known about it

fall on deaf ears ()

if something such as a warning, a request, or an attempt to change someone’s attitude falls on deaf ears, it is completely ignored by the person who hears it

finely (adverb)

if something such as a situation or a game is finely balanced or finely poised, it is impossible to guess how it will end

ignorance is bliss ()

used for saying that it is better not to know something, because then you will not worry

incalculable (adjective)

something that is incalculable is not certain enough to be planned for or known about before it happens

incognito (adverb)

using a false name, or changing your appearance so that you will not be recognized

inconceivable (adjective)

impossible to think about or imagine

indeterminable (adjective)

impossible to know or establish accurately

indeterminate (adjective)

not known or clearly established

intangible (adjective)

not able to be touched or measured, and difficult to describe or explain

in the background ()

in a place or situation in which people do not notice you

invisible (adjective)

not officially recognized or fairly represented

I/you/he etc can only guess ()

used for emphasizing that something is not known, especially someone’s feelings or the degree to which something is happening

little does someone know/realize ()

used for saying that someone does not know/realize that something is true

misunderstood (adjective)

if someone or something is misunderstood, people do not realize what they are really like

mystery (adjective)

a mystery person or thing is someone or something that you do not know the name of or do not know anything about

nameless (adjective)

a nameless person or thing has a name that you do not know

new (adjective)

new information or facts are things that you did not know previously

new (adjective)

if someone discovers something new, they find something that no one else knows about

there is more to someone than meets the eye ()

used for saying that someone has qualities or experience that someone else does not know about

there’s no knowing/saying/telling etc ()

it is impossible to know/say etc what is true or what will happen next

unaccounted for (adjective)

if something is unaccounted for, you are unable to explain what happened to it or where it is

unacknowledged (adjective)

not given the praise or admiration that is deserved

unacknowledged (adjective)

ignored or not thought about in a conscious way

unbeknown to someone ()

without someone’s knowledge

undeclared (adjective)

an undeclared activity or situation exists but has not been formally or officially announced

underground (adjective)

not well known by most people and different from what is usual or popular

undisclosed (adjective)

not reported publicly

undiscovered (adjective)

not noticed or known about

unexplained (adjective)

an unexplained event seems to have no explanation or reason

unexplored (adjective)

never visited by people

unexplored (adjective)

not thought about or considered before

unfamiliar (adjective)

used about things that you have no knowledge or experience of

unforeseeable (adjective)

impossible to know about or expect

unheard (adjective)

ignored

unheeded (adjective)

ignored

unheralded (adjective)

mainly journalism not previously noticed or praised much

unidentifiable (adjective)

impossible to recognize or name

unidentified (adjective)

not recognized or known

unknowable (adjective)

formal impossible to know

unknown to someone ()

used for saying that someone does not know something

unmarked (adjective)

something that is unmarked has no words or symbols on it to show what or where it is

unrecognized (adjective)

if something is unrecognized, people do not know or admit that it exists

unrecognized (adjective)

used about good things that people do that no one thanks or admires them for

unrecorded (adjective)

not written about or mentioned in official documents

unremarked (adjective)

formal not noticed or discussed, usually because no one is interested

unseen (adjective)

not seen or known about by anyone

unsolved (adjective)

an unsolved problem or mystery is one that you have not dealt with or explained

unspecified (adjective)

not mentioned, or not known

unsuspected (adjective)

existing without your knowledge

when someone’s back is turned ()

when someone is not there, or is not paying attention

you don’t know/haven’t heard the half of it ()

used for telling someone that a situation is more shocking or complicated than they think