unobservable

U1N1O1B3S1E1R1V4A1B3L1E1

adjective

That cannot be observed.

Similar
imperceptibleunperceivable
OriginEnglish observable ← Middle English un- ← Old English un- →
UncommonScrabble 19
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Meanings

adjectiveunobservable (not comparable)
  1. not comparableThat cannot be observed.
noununobservable (plural unobservables)

plural unobservables

  1. Something that cannot be observed.

Synonyms & antonyms

adjectivenot accessible to direct observation

Similar
imperceptibleunperceivable

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Englishobserve
  9. Englishobservable
  10. Englishunobservable

From un- + observable.

Full word history & related roots →
Cite this entry
APA

unobservable. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/unobservable

MLA

“unobservable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unobservable. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “unobservable,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/unobservable.

Source: unobservable on Wiktionary, CC BY-SA 4.0.