1. Lack of energy or vigor; listlessness or apathy.
Usage: general use
2. In medicine, a state of reduced or absent immune response to an antigen.
Usage: medical/immunology

Examples

• After weeks of illness, she felt a deep anergia that made even simple tasks seem impossible.
• The patient's anergia prevented him from engaging in his usual hobbies and social activities.
• Researchers studied anergia in cancer patients to understand why some tumors evade the immune system.
• Depression often manifests as anergia, leaving sufferers unmotivated and exhausted.
• The drug's side effects included anergia and difficulty concentrating.
• Anergia can be a symptom of various conditions, from chronic fatigue syndrome to autoimmune disorders.