How would you define the term 'callous'?

The term 'callous' is defined as being emotionally hardened and unfeeling. It refers to a lack of sensitivity towards the feelings of others and an indifference to their suffering. This term is often used to describe individuals who are unresponsive to emotional needs, exhibiting a cold or unempathetic demeanor.

In contrast, the other choices present qualities that are the opposite of being callous. 'Compassionate and kind' describes someone who is caring and considerate towards others. 'Sensitive and empathetic' indicates an awareness and understanding of others' emotional experiences, while 'joyous and cheerful' suggests a positive and happy disposition. These definitions highlight emotional responsiveness, which is fundamentally different from the hardness conveyed by 'callous.'