IPA: /ˌʌn.kəˈrɒb.ə.reɪ.tɪd/
KK: /ʌnˈkɔrəbəˌreɪtɪd/
Not supported by evidence or confirmation from other sources.
The detective dismissed the uncorroborated claims as unreliable.
Uncorroborated → It is formed from "un-" (meaning not), "corroborare" (from Latin, meaning to strengthen or confirm), and "-ated" (a suffix used to form past participles). The word "uncorroborated" means not confirmed or not supported by additional evidence.
Think of 'not' ('un-') confirming or 'strengthening' ('corroborare') something — that's why uncorroborated means something that lacks confirmation.