Meaning in the sources
Reported meaningMeaning: “sincerity” + “sturdy”
No etymology text in the cited sources.
Sources for this account (3)
- Wiktionary: 誠剛CC-BY-SA-4.0 · retrieved 2026-10-15
- Turkish Wiktionary: 誠剛CC-BY-SA-4.0 · retrieved 2026-10-14
- KANJIDIC2: 誠, 剛CC-BY-SA-4.0 · rev. 2026-288 · retrieved 2026-10-15

