uncorroborated

/ˌʌnkəˈrɒbəˌreɪtɪd/
adjective
  1. Not supported or confirmed by additional evidence or testimony.
    • Without a second source, the journalist's story remained uncorroborated.
    • The police dismissed the tip as uncorroborated and took no action.
    • The witness gave an uncorroborated account of the accident, so the jury was skeptical.
Antonyms