1. Not accessible or able to be reached.
    Synonyms: inaccessible
  2. Aloof and unfriendly.
  3. Without any serious competition; unbeatable.
    • 1863, Secrets of My Office, by a Bill Broker (page 313)
      Often, I say, have I wavered in my faith as to the unapproachable beatitude of bachelorism, when dining out, for example, at a well-appointed marital menage.

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