unsteady

Not firm, solid, or securely in place; unstable.

Fluctuating; changeable.

Not even or regular; wavering.

To cause to become unsteady.

Not steady.

In mech., having a motion which is not uniform or which does not take place with a constant angular velocity, or around a permanent axis through the center of gravity of the mass. Revolving bodies out of running balance have an unsteady motion.

To make unsteady; cause to be fluctuating.

Not held firmly in position, physically unstable.

Noted for lack of regularity or uniformity.

Inconstant in purpose, or volatile in behaviour.