“羸殆” 的英文翻譯可以是 **“exhausted and near collapse”** 或 **“weakened and on the brink of peril”**。

**解析：**
- “羸” 指瘦弱、虛弱（lean, feeble, exhausted）。
- “殆” 指危險、幾乎（peril, danger, nearly）。
- 二字連用強調身體或精神極度虛弱、瀕臨危險的狀態。

**例句：**
- 經過連日的苦戰，士兵們已羸殆不堪。
*After days of bitter fighting, the soldiers were exhausted and on the verge of collapse.*