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Imperceptibly vs Imperceptible - What's the difference?

imperceptibly | imperceptible |

As an adverb imperceptibly

is not noticeably, too small to be detected, too little to be perceived.

As an adjective imperceptible is

not perceptible, not detectable, too small in magnitude to be observed.

imperceptibly

English

Adverb

(en adverb)
  • Not noticeably, too small to be detected, too little to be perceived.
    • No one noticed that he moved imperceptibly backwards.

    imperceptible

    English

    Adjective

    (en adjective)
  • 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.