stálost

Stálost is a Czech noun that denotes the quality of being stable, constant, or lasting. It is derived from the adjective stálý, meaning stable or durable, and is used in both everyday language and technical contexts to express the persistence of a property or condition over time.

In everyday use, stálost refers to reliability and consistency: a person who acts with stálost maintains their behavior and decisions over time, and a process that operates with stálost runs steadily without unexpected interruptions. The term can also describe durable results or lasting outcomes in various activities and plans.

In science and engineering, stálost has more specific senses. Chemická stálost describes how resistant a substance is to chemical change or decomposition under defined conditions; it encompasses both chemical and thermodynamic stability and is often assessed by changes in composition or reactivity. In materials science, stálost materiálu denotes the ability of a material to retain its mechanical, optical, or chemical properties when exposed to environmental factors such as heat, humidity, light, or radiation. A common field use is stálost barev, the colorfastness of dyes and pigments. In physics and control theory, stálost can refer to dynamic stability—the tendency of a system to return to equilibrium after a disturbance.

In social sciences, stálost can describe constancy in institutions, norms, or personal characteristics, indicating low variability over time. The term is widely used across disciplines, with nuances dependent on the specific domain of application.