IPA: /ˈɒb.stɪ.nət/
KK: /ˈɑbstɪnɪt/
Refusing to change one's mind or actions despite good reasons to do so; stubborn.
She was obstinate about her decision to move to another city, even though her friends advised against it.
Comparative: more obstinate
Superlative: most obstinate
Obstinate → It is formed from "ob-" (meaning against) and "stare" (meaning to stand). The word describes someone who stands firm against change or persuasion, hence being stubborn or unyielding.
Think of someone who 'stands against' ('ob-') change or advice, which is why obstinate means being stubborn.