Obstinacy is stubborn refusal to change your mind. Sheer obstinacy, met with obstinacy, his obstinacy cost him.
It is the hostile word for what determination praises — the same behaviour, judged by whether you agree with the person. It implies refusing without good reason, which is what separates it from firmness. In medicine an obstinate symptom is one that will not shift.
1nounobstinacyStubborn refusal to change your mind.
“His obstinacy cost him the job, as he refused to accept any of the manager's suggestions.”
obstinacy is a stubbornness.
Proto-Indo-European
*steh₂-
Latin
obstinātus
Middle English
obstinat — obstinate, stubborn
English
obstinate
English, today
obstinacy
Built from
From obstinate + -cy. obstinate Middle English obstinat (“obstinate, stubborn”), from Latin obstinātus, perfect passive participle of obstinō (“set one's mind firmly upon, resolve”) (see -ate), from ob (“before”) + *stinare, from stare (“to stand”). a doublet of ostinato.
Etymology from Wiktionary, CC BY-SA