unnoticed
1. [ adjective ] not noticed
Synonyms: unseen unobserved
Related terms: undetected
2. [ adjective ] not noticed
Examples:

"hoped his departure had passed unnoticed"

Related terms: noticed disregarded ignored overlooked unperceived unobserved
Similar spelling:   unnoticeable
  unnoticeably
  unnotched
  unitize
  unitise
  undogmatic
  unmitigated
  undocked
  undogmatical
  untouched
  untoasted