Not amenable to guidance or control, ungovernable, unrestrained.

Of an animal: wayward, wild, uncontrollable. Obsolete. rare.

(un-, prefix1 affix 1b) = intemperable, adj.

unbridled, unruly.

That cannot be controlled, checked, restrained, or authoritatively regulated; uncontrollable.

= unrepressible, adj.

Without command; uncontrollable.

Not masterable.

Unable to be mastered or controlled; ungovernable. Obsolete.

Incapable of restraint, violently rebellious.

That cannot be controlled or restrained.

That cannot be ruled; unruly, ungovernable.

That cannot be governed; uncontrollable. Of persons (or animals).

Uncontrolled or uncontrollable; unbridled; wild.

That cannot be repressed or held down; irrepressible.

That cannot be coerced, restrained, or overpowered by force; irrepressible.

Not repressible; that cannot be repressed, restrained, or put down; irrestrainable. (Of persons, often more or less humorous.)

Wild, uncontrollable, rough. U.S. colloquial.

Incapable of being moderated or kept within bounds.