OBSTINATE

adj. stubborn, bullheaded; inflexible, not yielding; not easily subdued

v. persist in an obstinate way, persist in a stubborn manner

Verb
1. persist stubbornly; "he obstinates himself against all rational arguments"
(hypernym) persevere, persist, hang in, hang on, hold on
(derivation) stubbornness, bullheadedness, obstinacy, obstinance, pigheadedness, self-will
Adjective
1. stubbornly persistent in wrongdoing
(synonym) cussed, obdurate, unrepentant
(similar) unregenerate, unregenerated
2. resistant to guidance or discipline; "Mary Mary quite contrary"; "an obstinate child with a violent temper"; "a perverse mood"; "wayward behavior"
(synonym) contrary, perverse, wayward
(similar) disobedient
3. persisting in a reactionary stand
(synonym) stubborn, unregenerate
(similar) unreconstructed

v. be obstinate

v. be obstinate, recalcitrate; persist

(a.)
Pertinaciously adhering to an opinion, purpose, or course; persistent; not yielding to reason, arguments, or other means; stubborn; pertinacious; -- usually implying unreasonableness.
  

(a.)
Not yielding; not easily subdued or removed; as, obstinate fever; obstinate obstructions.
  

ADV
resolutely| obstinately