IPA: //ʌnˈspɛsɪfaɪd//
KK: /ʌnˈspɛsɪfaɪd/
Not clearly defined or stated; lacking specific details or information.
The report had several unspecified details that needed clarification.
Unspecified → It is formed from "un-" (meaning not) and "specify" (from Latin "specifcare", meaning to make specific or particular). The word "unspecified" means not made specific or not clearly defined.
Think of 'not' ('un-') making something 'specific' unclear — that's why unspecified means something that is not clearly defined.