1. a substance or agent that reduces or eliminates sensitivity or responsiveness to a stimulus
Usage: commonly used in dental and medical contexts
2. a person or thing that causes someone to become less emotionally responsive or reactive to something
Usage: used in psychology and general contexts

Examples

• The dentist applied a desensitizer to reduce tooth sensitivity before the procedure.
• Repeated exposure to the same content can act as a desensitizer to its emotional impact.
• This desensitizer gel helps patients with sensitive teeth tolerate hot and cold foods.
• The constant news coverage became a desensitizer, making people less reactive to shocking events.
• A topical desensitizer was prescribed to ease the patient's skin irritation.