unapparent

airy delicate disembodied fine imperceptible imponderable imprecise inappreciable incorporeal indiscernible indistinct insensible insubstantial nebulous shadowy tenuous thin unobservable unperceivable vague

believeable palpable perceptible substantial tangible understandable

ethereal unreal

abstract eluding hypothetical impalpable imponderable slight

abstruse airy dim elusive evading evanescent evasive imperceptible inappreciable incorporeal indeterminate insensible invisible rare shadowy slender uncertain unobservable unsubstantial unsure vague

factual real

definite obvious palpable perceptible tangible

imperceptible microscopic unseen

inconspicuous unseeable

concealed covert deceptive disguised ethereal gaseous ghostly ideal impalpable imponderable inappreciable indiscernible infinitesimal insensible intangible masked not in sight obliterated obscured occult out of sight perdu screened supernatural ulterior undisclosed ungraspable unnoticeable unobservable unperceivable unreal unviewable vaporous veiled wraithlike

detectable obvious seen visible