sǐ-m̄-sǐ是毋是

whether or not

whether or not; isn’t it so? (used as a tag question)

English Wiktionary, “是毋是” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%98%AF%E6%AF%8B%E6%98%AF · confidence: Medium (Wiktionary PH)