1. 难驾驭的;难对付的
Intractable people are very difficult to control or influence.

2. (问题或情况)棘手的,难处理的
Intractable problems or situations are very difficult to deal with.

1. not tractable
difficult to manage or mold

e.g. an intractable disposition
intractable pain
the most intractable issue of our era
intractable metal