# imperceptible

**Pronunciation:** /ˌɪmpərˈsɛptəbəl/ · im-per-SEP-tuh-bull

**CEFR level:** C1

**Part of speech:** adjective

## Meaning

So slight or small as to be impossible to detect or notice.

## Examples

- The changes to the document were imperceptible.
- He made an imperceptible shift in his seat.
- There was an imperceptible tremor in her hand.

## Synonyms

- slight — Very small or minor.
- subtle — Difficult to analyze or describe; delicate.
- undetectable — Impossible to find or notice.
- inconspicuous — Not clearly visible or attracting attention.

## Antonyms

- obvious — Easily seen or understood; clear.
- noticeable — Sufficiently great or important to be noticed.
- apparent — Clearly visible or understood; obvious.

## Collocations

- imperceptible difference — There was an imperceptible difference between the two shades of blue.
- imperceptible change — The aging process brings about imperceptible changes over time.
- imperceptible movement — The tectonic plates move with imperceptible slowness.

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