Difficult to perceive or grasp by the mind.
That cannot be definitely learned or ascertained
Not clear or distinct; faint or undefined
Not distinguishable, especially:
Lacking meaning; unintelligible.
That cannot be touched; incorporeal; impalpable
Not visible; that cannot be seen
Not readily noticeable.
Incapable of being apprehended by the mind or the senses
Lasting too long
Impossible or difficult to perceive by the mind or senses:
Too small to be noticed or make a significant difference; negligible:
That cannot be discerned; imperceptible
Find another word for imponderable. In this page you can discover 22 synonyms, antonyms, idiomatic expressions, and related words for imponderable, like: incalculable, impalpable, indeterminable, impossible, obscure, indistinguishable, insensible, intangible, invisible, unnoticeable and unobservable.