ADJ• bullheaded• hard-bitten• unyielding• obstinate• skittish• disobedient• gnarly• strong-willed• self-opinionated• piggish• dogged• hardmouthed• gnarled• intractable• inexorable• mulish• stubborn• wayward• wilful• stiff-necked• uncompromising• willful• froward• headstrong• self-willed• nonductile
