noun
permanence; persistence; durability
Abstract noun referring to the quality of lasting indefinitely or being permanent. Often used in formal or technical contexts.
この制度の永続性が疑問視されている。
The permanence of this system is being questioned.
We back up data to ensure its persistence.
持続性 emphasizes sustainability or continuity over time, whereas 永続性 stresses permanence without end.
Compound of 永続 (eizoku, 'permanence') + 性 (-sei, '-ness, -ity'). The exact historical derivation is straightforward from these components.