unfeeling

This term describes a profound absence of emotional resonance, often suggesting a cold, robotic, or callous disposition. It is typically used as a critique of character, implying a moral failure to connect with the pain or joy of others, which distinguishes it from being merely stoic or reserved.

In a medical or physiological sense, the word refers to anesthesia or nerve damage. This literal lack of tactile sensation creates a stark contrast with the figurative lack of empathy, moving the word from a psychological judgment to a physical description of numbness.