Having a strong tendency to change.
Readily decomposable.
Not stable.
Radioactive, especially with a short half-life.
Unpredictable.
Fickle.
Fluctuating; not constant.
To release (an animal) from a stable.
Subject to frequent changes (of direction or fortune, for example).
Lacking in flavour as a result of the leaves having been harvested during mid-season rains.
Accompanied by or featuring wind and/or precipitation.
Worn or otherwise affected by weather; (of a person's features or body) showing signs of age or wear.