unperceived
adjective
un·per·ceived ˌən-pər-ˈsēvd 
: not seen, observed, or given notice : not perceived
unperceived problems
Example Sentences
Recent Examples on the Web Over time, the angle of these lines changed, suggesting to audience members that the direction of the pendulum’s travel was shifting under the influence of an unperceived rotational motion—that of Earth. 
Alicia Ault, Smithsonian, 3 Feb. 2018
Alicia Ault, Smithsonian, 3 Feb. 2018 Word History
First Known Use
14th century, in the meaning defined above
unperceived
adjective
as in unsuspected
Synonyms & Similar Words
Relevance
- unsuspected
- unrecognized
- unaware
- unknown
- unmindful
- unconscious
- unbeknown
- unbeknownst
- unacquainted
- unsuspecting
- unknowing
- unfamiliar
- unwitting
- ignorant
- alloiobiogenesis
- Alloiocoela
- alloiogenesis
- alloisomerism
- allokineses
- allokinesis
- allokinetic
- Allolobophora
- allomaternal
- allomerism
- allomerisms
- allomerous
- allometric
- allometries
- allometron
- allometry
- allomones
- allomorph
- allomorphic
- allomorphism
- allomorphisms
- allomorphite
- allomorphoses
- allomorphosis
- allomorphs