shiftiness

2. The quality of being difficult to pin down or predict, like something that keeps changing.

The shiftiness of the weather made it hard to plan the picnic.

3. The tendency to move or change position often and unpredictably.

The shiftiness of the sand under our feet made walking difficult.

4. A shifty, evasive manner in speech or behavior.

There was a certain shiftiness in the way he avoided answering the question directly.