〇〇

まるまるmarumaru

noun · noun, used as a prefix

  1. symbol used as a placeholder (either because a number of other words could be used in that position, or because of censorship)
  2. certain
  3. unnamed
  4. undisclosed
  5. unidentified

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences