The classical line "管仲殁矣" means "Guan Zhong has passed away".
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history
殁 is a literary word for dying, rarely used alone in modern Chinese, which prefers 去世. It survives in formal phrases like 病殁 (to die of illness). It joins the death radical 歹 with 殳 for the sound, sharing a phonetic with 没.
register
Literary and formal — found in obituaries and classical text, not in everyday speech.
殳 on the right supplies the sound frame for the mò reading. The same right-hand element pairs with a water radical in 没, a close cousin in sound and the sense of vanishing.