WordReference Random House Unabridged Dictionary of American English © 2025
un•re•cord•ed 
(un′ri kôr′did),USA pronunciation adj. 
            - not recorded;
not reported in an official record. - not noted in historical documents:an unrecorded event; an unrecorded tradition.
 
- un-1 + record + -ed2 1575–85
 
'unrecorded' also found in these entries (note: many are not synonyms or translations):