The AI-powered English dictionary
comparative more intractable, superlative most intractable
Not tractable; not able to be managed, controlled, governed or directed. quotations examples
And I cannot but expect that this will repeatedly lead to the discovery that an initially intractable problem can be factored after all.
1972, Edsger W. Dijkstra, The Humble Programmer (EWD340)
(mathematics) (of a mathematical problem) Not able to be solved in polynomial time; too difficult to attempt to solve. examples
Difficult to deal with, solve, or manage. (of a problem) examples
Stubborn; obstinate. (of a person) examples
(medicine) Difficult to treat (of a medical condition). examples