Synonyms of imperceptible

imperceptible

adjective

ˌim-pər-ˈsep-tə-bəl 

as in invisible

not perceptible by a sense or by the mind

a slight difference in hue between the two glasses that's imperceptible unless they're placed side by side

Synonyms & Similar Words

• invisible
• subtle
• indistinguishable
• inappreciable
• slight
• impalpable
• unseen
• obscure
• inaudible
• intangible
• hidden
• insensible
• faint
• inconspicuous
• indistinct
• unnoticeable
• insignificant
• concealed
• trivial
• vague
• slender
• unseeable
• liminal
• disguised
• covert
• unapparent
• buried
• shrouded

Antonyms & Near Antonyms

• perceptible
• discernible
• appreciable
• visible
• palpable
• sensible
• tangible
• observable
• audible
• recognizable
• obvious
• noticeable
• evident
• ponderable
• clear
• prominent
• conspicuous
• striking
• manifest
• significant
• plain
• apparent
• distinct
• straightforward
• eye-catching

Example Sentences

Recent Examples of imperceptible

According to Abramson, the pulses are basically imperceptible, comparable to what a pacemaker sends to the heart. — Peter Hall, Scientific American, 29 Sep. 2026

Masons, carvers and conservators all work towards the preservation and enhancement and even creation of heritage, but as experience and knowledge grows so a gradual almost imperceptible transition occurs. — Literary Hub, 21 Sep. 2026

The building has no ramps as the designers kept all slopes to a gentle two percent that’s virtually imperceptible. — Edward Keegan, Chicago Tribune, 19 Sep. 2026

Behaviorists emphasized observable behavior, which could be measured experimentally, and generally avoided using imperceptible internal mental states to explain behavior. — Encyclopedia Britannica, 8 Sep. 2026