insensitivity

This term describes a failure to respond, whether the deficit is emotional or physiological. In a social context, it carries a strong negative connotation, suggesting a callousness or a lack of empathy that can be perceived as cruel or tactless. It often describes a personality trait or a specific behavioral lapse in a sensitive situation. In a medical or biological context, the word is neutral and descriptive. It refers to a lack of reaction to a stimulus, such as an anesthetic effect or a genetic condition where the body does not respond to a specific hormone or pain trigger.