Incapable of being apprehended by the mind or the senses
Difficult to perceive or grasp by the mind.
Impossible or difficult to perceive by the mind or senses:
That cannot be conclusively determined or explained
Too small to be noticed or make a significant difference; negligible:
That cannot be discerned; imperceptible
Not distinguishable, especially:
Lacking meaning; unintelligible.
That cannot be touched; incorporeal; impalpable
Not readily noticeable.
Not visible; that cannot be seen
Find another word for unobservable. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for unobservable, like: knowledge, observable, epiphenomenal, uncorrelated, impalpable, imperceptible, imponderable, inappreciable, indiscernible, indistinguishable and insensible.