IPA: /ˈɒb.stɪ.nə.si/
KK: /ˈɑbstəˌnəsi/
The quality of being very stubborn and refusing to change one's mind or behavior.
His obstinacy made it difficult for the team to reach a consensus.
Obstinacy → It is formed from "ob-" (meaning against) and "stare" (meaning to stand). The word describes a state of standing firm against something, reflecting stubbornness or persistence in one's opinions or actions.
Think of someone standing 'against' ('ob-') change or persuasion, which helps you remember that obstinacy means stubbornness.
No commonly confused words.