This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Stubbornly adhering to an attitude, opinion, or course of action; obdurate.

adj. Difficult to manage, control, or subdue; refractory.

adj. Difficult to alleviate or cure: an obstinate headache.

adj. Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.

adj. Said of inanimate things not easily subdued or removed.

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

adj. Not yielding; not easily subdued or removed

Pertinaciously adhering to an opinion, purpose, or course of action; not yielding to argument, persuasion, or entreaty; headstrong.

Springing from or indicating obstinacy.

Not easily controlled or removed; unyielding to treatment: as, an obstinate cough; an obstinate headache.

Synonyms Obstinate, Stubborn, Intractable, Refractory, Contumacious, pertinacious, headstrong, unyielding, dogged, wilful, persistent, immovable, inflexible, firm, resolute. The first five words now imply a strong and vicious or disobedient refusal to yield, a resolute or unmanageable standing upon one's own will. Stubborn is strictly negative: a stubborn child will not listen to advice or commands, but perhaps has no definite purpose of his own. Obstinate is active: the obstinate man will carry out his intention in spite of advice, remonstrance, appeals, or force. The last three of the italicized words imply disobedience to proper authority. Intractable, literally not to be drawn, handled, or governed, is negative; so is refractory: both suggest sullenness or perverseness; refractory is more appropriate where resistance is physical: hence the extension of the word to apply to metals. Contumacious combines pride, haughtiness, or insolence with disobedience; in law it means wilfully disobedient to the orders of a court.

adj. resistant to guidance or discipline

adj. stubbornly persistent in wrongdoing

v. persist stubbornly

adj. tenaciously unwilling or marked by tenacious unwillingness to yield

"Beth had been lying back against the seat for an hour or more with her eyes closed, having complained of a headache after quarreling with him again over what she termed his obstinate refusal to be conciliating with Richmond."

disobedient    unregenerate    unregenerated    hardheaded    strong-minded    pertinacious    cantankerous    unyielding    crossgrained    contrarious   

complaisant    obedient    obliging    manageable   

hold on    persevere    hang in    hang on    persist   

opinionated    refractory    persistent    pertinacious    firm    contumacious    inflexible    stubborn    unyielding    immovable   

stubborn    selfish    fierce    resolute    perverse    persistent    rebellious    reckless    jealous    vindictive