Shaky

adjective

1. Shaking or trembling.

   "a shaky hand"

2. Nervous, anxious.

   "He’s a nice guy but when he talks to me, he acts shaky."

3. (of wood) Full of shakes or cracks; cracked.

   "shaky timber"

4. Easily shaken; tottering; unsound.

   "a shaky constitution"

5. Wavering; undecided.