un·ru·ly 
(ŭn-rlē)
(ŭn-rlē)adj. un·ru·li·er, un·ru·li·est
1. Difficult or impossible to discipline, control, or rule: The substitute teacher faced unruly students in the classroom.
2. Difficult to keep in place or in order: tried to comb his unruly hair; trimmed back the unruly bushes.
[Middle English unreuli : un-, not; see UN-1 + reuli, easy to govern (from reule, rule; see RULE).]
un·ruli·ness n.