Divisible by two.
Flat and level.
Equal in proportion, quantity, size, etc.
On equal monetary terms; neither owing nor being owed.
parallel; on a level; reaching the same limit.
On equal terms of a moral sort; quits.
Convenient for rounding other numbers to; for example, ending in a zero.
Without great variation.
In reality; implying an extreme example in the case mentioned, as compared to the implied reality.
Emphasizing a comparative.
Signalling a correction of one's previous utterance; rather, that is.
An even number.
To make flat and level.
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.