The word **历史性** (lìshǐxìng) is a modern Chinese compound formed through a common morphological process where the root **历史** (lìshǐ), meaning "history," is combined with the suffix **性** (xìng), which denotes "nature," "character," or "quality." This structure follows the pattern of **X + 性** to create an adjective meaning "having the nature or character of X." Therefore, **历史性** literally translates to "historical in nature" and is used as an adjective to describe events, moments, or decisions that are of great historical significance or that mark a turning point in history.