unobservable - Wordage.info - Free Thesaurus Tool for Word Discovery - Expanded Thesaurus, Reverse Dictionary Lookup

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inappreciable collapse: too small to make a significant difference; "inappreciable fluctuations in temperature"

indiscernible collapse: difficult or impossible to perceive or discern; "an indiscernible increase in temperature"; barely able to be perceived; "the transition was almost indiscernible"; "an almost insensible change"

invisible collapse: impossible or nearly impossible to see; imperceptible by the eye; "the invisible man"; "invisible rays"; "an invisible hinge"; "invisible mending"

imponderable collapse: a factor whose effects cannot be accurately assessed; "human behavior depends on many imponderables"; difficult or impossible to evaluate with precision; "such imponderable human factors as aesthetic sensibility"

imperceptible collapse: impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch"

intangible collapse: assets that are saleable though not material or physical; lacking substance or reality; incapable of being touched or seen; "that intangible thing--the soul"; hard to pin down or identify; "an intangible feeling of impending disaster"; incapable of being perceived by the senses especially the sense of touch; "the intangible constituent of energy"- James Jeans; (of especially business assets) not having physical substance or intrinsic productive value; "intangible assets such as good will"

impalpable collapse: imperceptible to the senses or the mind; "an impalpable cloud"; "impalpable shadows"; "impalpable distinctions"; "as impalpable as a dream"; not perceptible to the touch; "an impalpable pulse"

insensible collapse: unresponsive to stimulation; "he lay insensible where he had fallen"; "drugged and senseless"; incapable of physical sensation; "insensible to pain"; "insensible earth"

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