Ungovernable (adjective)

Not governable; unable to be controlled or managed.

Origin:

From un- + governable.

Examples:

1. The ungovernable situation became chaotic.
2. The ungovernable crowd was difficult to control.
3. The ungovernable children were a handful for the parents.
4. The ungovernable horse was difficult to ride.
5. The ungovernable forces of nature were beyond human control.