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

Any deflection of electrons shows up as a tiny, almost imperceptible change in voltage. — Christopher McFadden, Interesting Engineering, 15 Aug. 2026

Anthropic's method reportedly embeds an imperceptible mark during text generation, persisting through copying. — Lance Eliot, Forbes.com, 13 Aug. 2026

The contact was imperceptible to the naked eye, but a space-age sensor in the ball had confirmed it. — Los Angeles Times, 12 July 2026

The tool, developed by independent AI engineer Luke Geel, analyzes past results and players’ activity—from posture to blink rate—spotting connections that might be imperceptible to the average viewer but visible to top pros. — Jacob Feldman, Sportico.com, 3 July 2026