narrowminded

This term carries a strong negative connotation, describing a rigid mental state characterized by prejudice or a lack of intellectual curiosity. It suggests a willful refusal to engage with new ideas, often stemming from a desire to maintain a specific status quo or a fear of the unknown.

In social contexts, calling someone narrowminded is an accusation of intolerance. It is more critical than "conservative" or "traditional," as it implies a cognitive limitation or a moral failure to be open-minded. It is frequently used in discussions regarding social progress, cultural diversity, and ideological disputes.