IPA: /ˌʌn.kənˈfɛst/
KK: /ʌnˈkənˌfɛst/
Something that has not been admitted or acknowledged, especially in a context where one is expected to confess or reveal it.
He carried an unconfessed secret that weighed heavily on his mind.
Unconfessed → It is formed from "un-" (meaning not) and "confess" (from Latin "confiteri", meaning to acknowledge or admit). The word "unconfessed" means not acknowledged or admitted, particularly in the context of sins or faults.
Think of 'not' ('un-') acknowledging something ('confess') — that's why unconfessed means something that hasn't been admitted.