What term describes the complete stoppage of action related to a person's life?

The term that describes the complete stoppage of action related to a person's life is "cessation." This word specifically refers to the act of ending or stopping something, particularly in the context of life processes. In medicolegal death investigation, cessation signifies the point where all biological functions have permanently come to an end, marking death.

Using "cessation" in this context highlights the finality and the absolute nature of the stoppage. It conveys not just the physical end of life but also the cessation of all related physiological activities, which is crucial for various legal and medical determinations regarding death.

Other terms, while related, do not convey the same degree of finality and specificity. For instance, “termination” can imply an ending but does not inherently indicate a natural or biological process nor does it emphasize the aspect of life cessation as effectively as "cessation." "Completion" often refers to finishing a task or process but lacks the mortality context. "Expiration," although it can indicate the end of life, is often used in broader contexts like contract terms or product shelf life, rather than specifically denoting the complete stoppage of a person's life actions.