Buffer is a compound that resists pH change.
In psychology, a buffer is a psychological defense mechanism that helps to protect an individual from experiencing negative emotions or stress. Buffers can be internal, such as personal qualities or coping strategies, or external, such as social support or other resources.
For example, an individual might use humor as a buffer to protect themselves from feeling anxious or stressed in a difficult situation. This might involve making jokes or finding ways to see the lighter side of things in order to reduce anxiety and stress.
Another example of a buffer might be social support. An individual who has a strong support system of friends and family might be better able to cope with stress or negative emotions because they have people they can turn to for help and support.