How to say "unmarked" in Japanese

• 白いしろいJLPT N5approx.Common
  i-adjectiveCovers the sense of a surface that is unmarked, blank or spotless, typically paper or another white background. Choose this when 'unmarked' means free of writing, stains or marks.
• 覆面ふくめんJLPT N1approx.Common
  prenominal modifier, nounCovers the sense of unmarked in the sense of anonymous or incognito, such as an unmarked police car or an unmarked investigator. It refers to identity being concealed, not to a physical surface.
• ノーマークCommon
  no-adjectiveA loanword covering 'unmarked (player)': an athlete left unguarded or uncovered by the opposition. This sense is limited to sports contexts and does not apply to blank paper or anonymous vehicles.

For 'unmarked' you must first ask which sense you mean: a blank/uncolored surface takes 「白い」, an anonymous or unlabeled vehicle or person takes 覆面, and an unguarded player in sports takes 「ノーマーク」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 無標むひょうunmarked
• 白いしろいblank (e.g. paper)
• 覆面ふくめんanonymous
• ノーマークunmarked (player)