niestabilne

Niestabilne is a Polish adjective meaning unstable or not stable. It is formed from stabilny (stable) with the negation prefix nie-. The form niestabilne is used with neuter singular nouns and with plural nouns that are not masculine personal; masculine singular uses niestabilny, feminine singular niestabilna, and masculine personal plural niestabilni.

In scientific and applied contexts, niestabilne describes systems or states that lack a steady equilibrium and tend to change when perturbed. In physics and mathematics, a system is in niestabilne equilibrium if small disturbances grow over time rather than decay. In chemistry and materials science, niestabilne compounds or isotopes are those that decompose, react, or decay quickly. In biology and medicine, a niestabilny stan refers to fluctuating or precarious health conditions; in clinical contexts the term is often used descriptively rather than as a diagnosis. In economics and political science, niestabilne markets, regimes, or environments are prone to sudden shifts or volatility. In meteorology, niestabilne atmospheric conditions indicate convection and potential storms.

Usage notes emphasize that stability is context-dependent, including time scale and perturbations considered. The term is neutral and descriptive, not inherently pejorative, though it can carry evaluative nuance depending on the field and stakes involved. Related concepts include stability, unstable equilibrium, and instability analyses used to assess how systems respond to disturbances.