imperceptible

im·per·cep·ti·ble

adj \ˌim-pər-ˈsep-tə-bəl\

Definition of IMPERCEPTIBLE

: not perceptible by a sense or by the mind : extremely slight, gradual, or subtle <imperceptible differences>

— im·per·cep·ti·bly \-ˈsep-tə-blē\ adverb

Examples of IMPERCEPTIBLE

1. These changes will be imperceptible to most people.
2. <a slight difference in hue between the two glasses that's imperceptible unless they're placed side by side>

Origin of IMPERCEPTIBLE

Middle English, from Middle French, from Medieval Latin imperceptibilis, from Latin in- + Late Latin perceptibilis perceptible

First Known Use: 15th century

Related to IMPERCEPTIBLE

Synonyms: impalpable, inappreciable, indistinguishable, insensible

Antonyms: appreciable, discernible (also discernable), palpable, perceptible, ponderable, sensible

Related Words: inaudible, intangible, invisible; inconspicuous, indistinct, unnoticeable, unseeable, unseen; faint, insignificant, liminal, slender, slight, subtle, trivial; buried, concealed, covert, disguised, hidden, obscure, shrouded, unapparent, vague

Near Antonyms: audible, observable, recognizable, tangible, visible; clear, conspicuous, evident, eye-catching, manifest, noticeable, obvious, plain, prominent, striking; apparent, distinct, significant, straightforward

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Rhymes with IMPERCEPTIBLE

insusceptible, unacceptable