結核

1. Origins, structure, and basic meaning

• Structure: The medical noun 結核 (けっかく) is the specific disease tuberculosis.
• Basic usage: It appears in phrases such as 結核に関する記録 for records about the disease and 結核の療養 for recuperation from it.

2. Common pitfalls and similar expressions

• The disease name in context
  • It is the name of a disease, not a general word for symptoms such as coughing or weakness.