顽疾 Traditional form: 頑疾 Pinyin (reading): wánjí Definitions: ineradicable disease fig. deep-seated problem perennial problem Characters: 顽 - stubborn, recalcitrant, obstinate 疾 - sickness, illness, disease; to envy, to hate Traditional characters: 頑 - stubborn, recalcitrant, obstinate 疾 - sickness, illness, disease; to envy, to hate