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adjectivenot responding to treatment
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adjectivetenaciously unwilling or marked by tenacious unwillingness to yield
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Synonyms & Similar Words
determined persistent sturdy obstinate tenacious stubbornness uncompromising pigheaded disobedient inflexible dogged unyielding hardheaded cantankerous stroppy dour bullheaded refractory intractable mulish unregenerate cross-grained pertinacious stiff-necked strong-minded strong-willed bloody-minded bolshy bullet-headed contrarious