破 ㄆㄛ ˋ pò 釜 ㄈㄨ ˇ fǔ 沉 ㄔㄣ ˊ chén 舟 ㄓㄡ zhōu lit. to break the cauldrons and sink the boats (idiom); fig. to cut off one's means of retreat to burn one's boats