Définitions
1.AdjectiveNot stable."unstable foundation; The structure is too unstable to stand safely."
2.AdjectiveHaving a strong tendency to change.
3.AdjectiveFluctuating; not constant."politically unstable; The political situation remains unstable."
4.AdjectiveFickle.
5.AdjectiveUnpredictable.
6.AdjectiveReadily decomposable."chemically unstable"
7.AdjectiveRadioactive, especially with a short half-life.
8.VerbTo release (an animal) from a stable.