inflexible, resolute, adamant, unwavering, stubborn, obstinate, firm, steadfast, relentless, implacable
stubborn - headstrong - pigheaded - intransigent - unyielding - inflexible - mulish - willful - recalcitrant - persistent
The word "obstinate" describes a person or attitude that is unreasonably or inflexibly stubborn, especially in holding on to opinions, decisions, or behaviors despite good reasons to change. An obstinate individual resists persuasion, advice, or pressure, often continuing on a chosen path even when it is clearly unwise or unhelpful. This term usually carries a negative connotation, suggesting rigidity, narrow-mindedness, or a refusal to adapt. It can apply to people, attitudes, problems, or situations that are difficult to change or overcome. In everyday language, it often emphasizes a frustrating level of stubborn persistence.