unseeable

/ˈʌnˌsiəbəl/

Definitions of unseeable

1. adjective

   impossible or nearly impossible to see; imperceptible by the eye
   synonyms: invisible

   covert

   secret or hidden; not openly practiced or engaged in or shown or avowed

   imperceptible, unperceivable

   impossible or difficult to perceive by the mind or senses

   camouflaged

   made invisible by means of protective coloring

   concealed, hidden, out of sight

   not accessible to view

   infrared

   having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end

   lightless

   giving no light

   nonvisual

   not resulting in vision

   occult

   hidden and difficult to see

   ultraviolet

   having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end

   undetectable

   not easily seen

   unseeyn

   not seen or perceived