
Intractable
Hard to Solve
Used for problems with no easy solution, typically social, political, or economic issues.

Global warming is an intractable issue, affected by various global factors.
Persistent Issue
Implies that the problem is not only difficult but also enduring over time.

The war has become an intractable conflict, with no end in sight.
Not Literal
Often used metaphorically to describe abstract dilemmas, not just physical struggles.

He grapples with the intractable dilemma of choosing career over family.
Compare with
DifficultHeadstrongManageableObstinateRecalcitrantRefractoryStubbornUnrulyYield
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