IPA: /ˌʌn.kənˈfɜːrmd/
KK: /ʌnˈkənˌfɜrmd/
Not finally established or verified; lacking confirmation or proof.
The report remains unconfirmed until further evidence is provided.
Unconfirmed → It is formed from "un-" (meaning not) and "confirmed" (from Latin "confirmare", meaning to strengthen or make firm). The word "unconfirmed" means not made firm or not verified.
Think of 'not' ('un-') making something 'firm' or 'strong' ('confirmare') — that's why unconfirmed means something that hasn't been verified.