unmarked
Definitions
Not having any distinguishing sign, label, or identification.
Not noticed or observed; unremarked.
In linguistics, representing the base or neutral form of a word or category.
Examples
The police officer was driving an unmarked car while patrolling the neighborhood.
The package arrived at the doorstep in an unmarked brown box with no return address.
Synonyms
blank plain unlabeled anonymous featureless unidentified clear