unperceivable

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

Antonyms:

perceptible

capable of being perceived by the mind or senses

audible, hearable

heard or perceptible by the ear

detectable, noticeable

capable of being detected

discernible

capable of being perceived clearly

faint, weak

deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc

palpable

can be felt by palpation

perceivable

capable of being perceived especially by sight or hearing

recognizable

easily perceived; easy to become aware of

sensible

readily perceived by the senses

seeable, visible

capable of being seen; or open to easy view

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