呉越同舟 [ごえつどうしゅう] – strange bedfellows; bitter enemies in the same boat
- 呉 [ゴ] – The ancient Chinese kingdom of Wu
- 越 [エツ] – The ancient Chinese kingdom of Yue
- 同 [ドウ・おなじ] – the same
- 舟 [シュウ・ふね] – boat
The Wu (呉) and Yue (越) Kingdoms existed in China from 770 to 476 BC. As they were in a nearly constant state of war with each other, the image of both of them literally being in the same boat conjures up notions of very strange bedfellows.