unperceivable

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unperceivable

(ˌʌnpəˈsiːvəbəl)
adj
obsolete imperceptible
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.unperceivable - impossible or difficult to perceive by the mind or senses; "an imperceptible drop in temperature"; "an imperceptible nod"; "color is unperceivable to the touch"
inaudible, unhearable - impossible to hear; imperceptible by the ear; "an inaudible conversation"
impalpable - imperceptible to the senses or the mind; "an impalpable cloud"; "impalpable shadows"; "impalpable distinctions"; "as impalpable as a dream"
invisible, unseeable - impossible or nearly impossible to see; imperceptible by the eye; "the invisible man"; "invisible rays"; "an invisible hinge"; "invisible mending"