Late 15th century; earliest use found in Higden's Polychronicon. From post-classical Latin obstinantia obstinacy, stubbornness from classical Latin obstinant-, obstināns, present participle of obstināre + -ia; compare -ance.
Definition of obstinance in US English:
obstinance
nounˈɒbstɪnəns
Obstinacy.
Origin
Late 15th century; earliest use found in Higden's Polychronicon. From post-classical Latin obstinantia obstinacy, stubbornness from classical Latin obstinant-, obstināns, present participle of obstināre + -ia; compare -ance.