Synonyms of intractable

1 Syllable
pat, mule, tough, grim, wild
2 Syllables
willful, locked, steely, headstrong, awkward, fractious, stubborn, balkier, wayward, mulish, balky, naughtiest, naughtier, hard-line, beastlier, steelier, grimmer, grimmest, naughty
3 Syllables
unhearing, incompliant, wrongheaded, unruly, rebellious, bull-headed, pig-headed, self-willed, unpliable, tenacious, hard-shelled, unbending, ruffianly, unyielding, uncompliant, uncomplying, untoward, contrary, hardheaded, pigheaded, strong-minded, perverse
4 Syllables
implacable, incurable, resolute, troublesome, cantankerous, refractory, disobedient, contumacious, immovable, pertinacious, unreformed, insoluble, obdurate, indocile, infestive, intransigent, recidivous, obstinate, inflexible, unbendable, unrelaxed, recalcitrant
5 Syllables
unadaptable, incorrigible, indomitable, uncorrectable, indefeasible, inexpugnable, unamenable, unconquerable, negativistic, uncompromising, uncontrollable, ungovernable, unmanageable, inalterable, irredeemable, undisciplined
6 Syllables
uncooperative, insubordinate, opinionative