Insensate is an adjective that means unfeeling.

Our word of the day comes from the Latin word sensus (SEN soos) which means ‘sense,’ a term that can mean many things depending on its context. Similarly, the word insensate, which means ‘lacking sense or feeling,’ can refer to someone lacking ‘common sense,’ lacking consciousness or lacking compassion, such as: I found Nina’s behavior after my accident to be insensate. The compassionate thing to do would have been to offer me a seat so I could rest the toe I stubbed.’