Adjective unmarked has 2 senses
  1. unmarked - not having an identifying mark; "unmarked cards"; "an unmarked police car"
    Antonyms:
    marked, asterisked, starred, well-marked, scarred
  2. overlooked, unmarked, unnoted - not taken into account; "his retirement was not allowed to go unmarked"
    Antonym: noticed (indirect, via unnoticed)
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