INTRACTABLE
intractable
(adjective) not tractable; difficult to manage or mold; “an intractable disposition”; “intractable pain”; “the most intractable issue of our era”; “intractable metal”
Source: WordNet® 3.1
Etymology
Adjective
intractable (comparative more intractable, superlative most intractable)
Not tractable; not able to be managed, controlled, governed or directed.
(maths) (of a mathematical problem) Not able to be solved.
(of a problem) Difficult to deal with, solve, or manage.
(of a person) Stubborn; obstinate.
(medicine) Difficult to treat (of a medical condition).
Source: Wiktionary
In*tract"a*ble, a. Etym: [L. intractabilis: cf. F. intraitable,
formerly also intractable. See In- not, and Tractable.]
Definition: Not tractable; not easily governed, managed, or directed;
indisposed to be taught, disciplined, or tamed; violent; stubborn;
obstinate; refractory; as, an intractable child.
Syn.
– Stubborn; perverse; obstinate; refractory; cross; unmanageable;
unruly; headstrong; violent; ungovernable; unteachable.
– In*tract"a*ble*ness, n.
– In*tract"a*bly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition