# undetectable

**Pronunciation:** /ˌʌndɪˈtɛktəbl/ · un-dih-TEK-tuh-bul

**CEFR level:** B2

**Part of speech:** adjective

## Meaning

Impossible to find or notice.

## Examples

- The virus was undetectable in his blood tests.
- Her presence in the room was undetectable.
- The changes to the document were subtle and virtually undetectable.

## Synonyms

- hidden — Not seen or found.
- unseen — Not perceived by the eyes.
- imperceptible — So slight or small as to be almost impossible to notice.
- invisible — Unable to be seen.

## Antonyms

- detectable — Able to be found or noticed.
- obvious — Easily seen or understood; clear.
- apparent — Clearly visible or understood; obvious.

## Common patterns

- undetectable by — Impossible to find or notice using a specific method or tool. — The submarine remained undetectable by enemy sonar.
- undetectable to — Impossible to find or notice for a particular observer or system. — The subtle changes were undetectable to the untrained eye.

## Collocations

- undetectable by — The new security system is undetectable by standard surveillance equipment.
- virtually undetectable — The contamination was virtually undetectable in the final product.
- completely undetectable — The spy's disguise made him completely undetectable.

Canonical URL: https://anaversity.com/dictionary/english/undetectable

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