Synonyms and antonyms of Not reliable or trustworthy in British Thesaurus

official (adjective)

used about information that someone in authority provides. This word is sometimes used for suggesting that the information is not completely reliable

unreliable (adjective)

unreliable information is not definitely true or accurate

unreliable (adjective)

someone who is unreliable will not do what you ask them to do, or will not do it well

suspect (adjective)

something or someone that is suspect cannot be trusted or believed

feckless (adjective)

a feckless person is not reliable, does not care about achieving anything, and has no clear plans

untrustworthy (adjective)

not capable of being trusted or depended on

flighty (adjective)

changing your opinions and behaviour often, and not serious or reliable

inconsistent (adjective)

not always behaving in the same way or producing the same results

inconsistency (noun)

the state of being inconsistent

unreliable (adjective)

an unreliable witness is someone whose evidence is unlikely to be accepted in a court of law

ditzy (adjective)

informal silly and not reliable

dodgy (adjective)

Britishinformal dishonest, criminal, or not reliable

flimsy (adjective)

not very reliable, or not easy to believe

reptilian (adjective)

mainly literary someone who is reptilian is very unpleasant and you do not like or trust them

shonky (adjective)

Australianvery informal dishonest, not reliable, or of bad quality

unsourced (adjective)

using information that is not reliable

unstable (adjective)

physics an unstable object is likely to move or change because of the forces affecting it

unsteady (adjective)

not reliable