Ticklish.
Not easily managed
To tickle, to touch lightly.
To bring forth young, as a cat; to kitten; to litter.
Fickle.
Readily decomposable.
Not stable.
Radioactive, especially with a short half-life.
Unpredictable.
Having a strong tendency to change.
Fluctuating; not constant.
To release (an animal) from a stable.