Unruly, a. [Compar. Unrulier (, superl. Unruliest.]
Etymology: [Pref. un- not + rule. Cf. Ruly.]
Not submissive to rule; disregarding restraint; disposed to violate; turbulent; ungovernable; refractory; as, an unruly boy; unruly boy; unruly conduct. But the tongue can no man tame; it is an unruly evil, full of deadly poison. James iii. 8.
Shades of meaning
Fernald has no entry of its own for unruly; he lists it under restive.
He lists it without comment; the entries above explain its neighbors.