anonymous

/əˈnɒnəməs/
/əˈnɒnəməs/

adjective

  1. Lacking a name; not named, for example an animal not assigned to any species.

  2. Without any name acknowledged of a person responsible

    "an anonymous pamphlet"

  3. Of unknown name; whose name is withheld

    "No customer personal data will be retained unless it is rendered anonymous."

  4. Lacking individuality.

    "an anonymous office block in a soulless industrial estate"

Synonyms: on the merits, faceless, nameless, unidentified, unknown, unnamed
Antonyms: onymous