unmarked >> ʌnˈmɑːkt
Definition: [adjective] not marked or bearing identifying markings.
Example: an unmarked police car
Definition: [adjective] not noticed.
Example: it's a pleasure to reward them for work which might otherwise go unmarked
Definition: [adjective] (of a player in a team game) not marked by a player from the opposing team.
Example: Eyres was left unmarked and duly scored from eight yards