Insensibleness is the state of being insensitive or unaware of one's surroundings, emotions, or actions. Some antonyms for this word include sensitivity, awareness, responsiveness, sympathy, empathy, and understanding. These words all relate to the ability to perceive and respond to one's surroundings and the emotions of others. Being sensitive and empathetic means being able to understand and feel the emotions of others, while awareness and responsiveness imply being alert and able to react quickly to changing circumstances. In short, the antonyms of insensibleness represent qualities that are essential for effective communication, connection, and empathy with others.