Which word describes someone emotionally hardened or insensitive?

• A. Clandestine
• B. Caustic
• C. Aberration
• D. Callous

Answer: (D)

Callous describes someone emotionally hardened or insensitive—lacking empathy for others. This fits the prompt because it names a personality trait of being unmoved by others’ feelings or suffering. Clandestine means secret or hidden, not about emotional traits. Aberration is a deviation from the norm, not about how a person feels. Caustic describes something harshly critical or corrosive in tone, often in language, but it doesn’t by itself convey a general lack of empathy. So the best choice is callous, as it directly signals an insensitive, unfeeling attitude. For example: “His callous disregard for their needs shocked the team.”