unnoticeably

Definitions

In a manner that is not easily seen or detected.

In a way that escapes observation or attention.

Examples

The thief moved unnoticeably through the shadows to avoid detection.

The slight change in the room's temperature happened so unnoticeably that no one complained.

Synonyms

imperceptibly invisibly stealthily subtly quietly obscurely undetectably

Antonyms

noticeably visibly conspicuously obviously clearly prominently strikingly