What term is used to describe a person unable or unfit to make decisions?

The term "incompetent" specifically refers to a person who lacks the capacity or ability to make decisions due to mental, emotional, or physical reasons. In legal and healthcare contexts, incompetence can identify individuals who cannot understand or process information necessary to make informed choices about their own care or living arrangements. This designation is significant in healthcare because it often necessitates intervention, such as appointing a guardian or surrogate decision-maker to ensure that the person's health and legal rights are appropriately managed.

The other terms do not accurately reflect the specific legal and medical implications of being unable or unfit to make decisions. "Inexperienced" suggests a lack of knowledge or familiarity but does not imply a permanent or ongoing inability to make decisions. "Irresponsible" generally refers to a failure to fulfill obligations or duties but does not denote an absence of capacity. "Intolerant" describes a lack of acceptance or understanding towards others, which is unrelated to decision-making abilities. Thus, the most precise term for an individual who cannot make decisions is "incompetent."