IPA: /ʌnˈtreɪst/
KK: /ʌnˈtreɪst/
Not having been followed or discovered; lacking a clear path or record.
The origins of the artifact remain untraced despite extensive research.
Untraced → It is formed from "un-" (meaning not) and "trace" (from Old French *tracer*, meaning to mark or draw). The word "untraced" means not marked or drawn, indicating something that has not been followed or discovered.
Think of something that is 'not' ('un-') 'marked' or 'drawn' ('trace') — that's why untraced means it hasn't been found or followed.