intractable

IPA: ɪntrˈæktʌbʌɫ

Not tractable; not able to be managed, controlled, governed or directed.
(mathematics) (of a mathematical problem) Not able to be solved in polynomial time; too difficult to attempt to solve.
Difficult to deal with, solve, or manage. (of a problem)
Stubborn; obstinate. (of a person)
(medicine) Difficult to treat (of a medical condition).

Examples of "intractable" in Sentences

If they last longer than a month, they are termed intractable.
This society does not deal well with long-term intractable problems of any kind.
The story is already stale and yet it continues to remain intractable, organizationally and professionally, for most media organizations.
This pattern has developed into a state that conflict scholars label intractable and that mathematicians call an attractor: the Israel-Palestinian conflict has thus become an intractable attractor.
So any perception by conservatives that progressives are intractable is itself only further demonstration of THEIR absolute unwillingness to engage in anything which might, by even the most reckless stretch of the imagination, ever be mistaken for reasoned discourse or genuine political interchange.