Late Middle Chinese origin
Source-reported/jɨau/ → /jɔː/ → /joː/ From Middle Chinese 洋 (MC yang). Compare modern Mandarin 洋 (yáng).
Sources for this account (2)
- Wiktionary: 洋CC-BY-SA-4.0 · retrieved 2026-10-15
- JMnedict entry 5691083CC-BY-SA-4.0 · rev. 2026-10-15 · retrieved 2026-10-15

