nihilist

noun

Etymology: From Latin nihil (“nothing”) + -ist.

1. A person who accepts or champions nihilism.

   ““Promortalists recognize and seek to minimize suffering rather than embrace misanthropy and amorality,” Keneally says, noting that the writings attributed to Bartkus indicate he rejected the “sociopath[ic]” tendencies of nihilists” in a May 2025 forum post. […] According to the ISD report, the disorganized and ever-changing nature of nihilist ideologies makes it harder to understand and counter.”

2. An absolute skeptic; a person who believes in the truth of nothing.