Meaning in the sources
Not establishedMeaning: “polish” + “two”
No etymology text in the cited sources.
Sources for this account (3)
- Wikidata Q136379435CC0-1.0 · retrieved 2026-10-15
- JMnedict entry 5249478CC-BY-SA-4.0 · rev. 2026-10-15 · retrieved 2026-10-15
- KANJIDIC2: 研, 二CC-BY-SA-4.0 · rev. 2026-288 · retrieved 2026-10-15

