unmarked

adjective

• 1not marked or bearing identifying markings:an unmarked police car his skin was unmarked
• Linguistics (of a word or other linguistic unit) having a more general meaning or use than a corresponding marked term:‘duck’ is unmarked, whereas ‘drake’ is marked

• 2not noticed:it’s a pleasure to reward them for work which might otherwise go unmarked

• 3British (of a player in a team game) not marked by a player from the opposing team:Eyres was left unmarked and duly scored from eight yards