‘安全性’ (ān quán xìng) is a noun meaning ‘safety’ as an inherent property or characteristic — not the state of being safe, but rather the degree or quality of being safe. It combines 安 (ān, ‘peace, safety’), 全 (quán, ‘complete, whole, unharmed’), and 性 (xìng, a nominalizing suffix meaning ‘-ness’ or ‘-ity’). Together, they form a technical, abstract noun commonly used in formal, scientific, or regulatory contexts.

This word appears frequently when evaluating products, procedures, or systems — especially in medicine, engineering, food production, and digital technology. For example, doctors discuss the ‘安全性’ of a new drug, engineers assess the ‘安全性’ of a bridge design, and app developers test the ‘安全性’ of user data handling. Unlike the simpler word 安全 (ān quán), which can function as both noun and adjective, 安全性 always refers to the measurable or evaluative aspect of safety — often requiring evidence, testing, or expert judgment.