IMPERCEPTIBLE

imperceptible

Adjective

  1. Not perceptible, not detectable, too small in magnitude to be observed.
    We all missed the imperceptible shake of his head as he tried to warn us without being seen.


The above text is a snippet from Wiktionary: imperceptible
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!