unsurudur

Unsudur is a term found in a fictional metaphysical framework used in worldbuilding and speculative fiction. It denotes an underlying substrate that persists through change and underlies phenomena. In the fictional setting, unsurudur is not equivalent to matter or energy; instead it is a fundamental condition or essence that enables persistence of identity across different states. The term has no attested usage in real-world philosophy and is not recognized outside its fictional context.

In-universe, unsurudur is described as a coined concept whose interpretation varies by source. Some texts present it as an underlying duration—an abstract time-like quality that objects share. Others treat it as a non-material substratum that bears properties and relations without being directly observable. Debates concern whether unsurudur constitutes a substance, a relation, or a framework for organizing experience.

It serves as a terminological anchor for discussions of persistence, change, and identity in the fictional narratives and treatises, and is often contrasted with material substance, energy, or pure temporal duration. While it appears in encyclopedias and dialogue, unsurudur remains a fictional construct, used to explore metaphysical questions rather than to report empirical findings.