unsteady

Etymology

From un- + steady. Like steady, the word first appeared in English around 1530. The word is comparable to Old Frisian onstedich, Low German unstadig, etc.

adj

1. Not held firmly in position, physically unstable.
   A slightly unsteady item of furniture.
2. Lacking regularity or uniformity.
3. Inconstant in purpose, or volatile in behavior.

verb

1. To render unsteady, removing balance.