Shaky (adjective)

1. Trembling or vibrating.
2. Unsteady or insecure.
3. Not firm or reliable.

Origin:

The word "shaky" comes from the word "shake" which means to move or cause to move back and forth or up and down with quick, short movements.

Examples:

1. The earthquake left the building shaky.
2. His hands were shaking with fear.
3. The shaky ladder was not safe to climb.
4. The economy was in a shaky state.
5. The shaky alliance between the two countries fell apart.