intractable -
not tractable; difficult to manage or mold; "an intractable disposition"; "intractable pain"; "the most intractable issue of our era"; "intractable metal"
manipulable,
tractable easily managed (controlled or taught or molded); "tractable young minds"; "the natives...being...of an intelligent tractable disposition"- Samuel Butler
defiant,
noncompliant boldly resisting authority or an opposing force; "brought up to be aggressive and defiant"; "a defiant attitude"
disobedient not obeying or complying with commands of those in authority; "disobedient children"
difficult,
unmanageable not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"
untamed,
wild deviating widely from an intended course; "a wild bullet"; "he threw a wild pitch"
intractable Not easy to be drawn or guided by persuasion.
intractable Of a problem. Can be solved in theory (e.g., given arbitrarily long time), but which in practice takes too long for their solutions to be useful.