unperceivable

Other forms: unperceivably

Definitions of unperceivable

1. adjective

   impossible or difficult to perceive by the mind or senses
   “color is unperceivable to the touch”

   synonyms: imperceptible

   inaudible, unhearable

   impossible to hear; imperceptible by the ear

   impalpable

   imperceptible to the senses or the mind

   impalpable

   not perceptible to the touch

   incognizable, incognoscible

   incapable of being perceived or known

   indiscernible, insensible, undetectable

   barely able to be perceived

   subliminal

   below the threshold of conscious perception

   unobservable

   not accessible to direct observation

   invisible, unseeable

   impossible or nearly impossible to see; imperceptible by the eye