intractable

incurable intransigent stubborn uncompromising unmanageable

awkward bull-headed cantankerous contrary fractious hang-tough hard-line headstrong immovable incompliant indocile indomitable insoluble locked locked-in mulish obdurate obstinate pat pertinacious perverse pig-headed recalcitrant refractory resolute self-willed tenacious tough unbending uncooperative undisciplined ungovernable unpliable unruly unyielding wayward wild willful

willing

manageable