pigheaded

This term carries a strong negative connotation, suggesting a level of stubbornness that is irrational or foolish. While a word like determined implies a positive strength of will, pigheaded describes a willful blindness to logic or reason, often resulting in an annoying or obstructive behavior.

Usage typically occurs in informal or critical contexts to describe someone who is impossibly difficult to persuade. It evokes an image of mindless persistence, where the individual clings to a position not out of conviction, but out of a refusal to yield to others.