How to say "chronic" in Japanese

• 慢性まんせいCommon
  no-adjectiveA noun covering the medical sense of 'chronic': an illness that persists long-term rather than being acute. It is the word used in medical contexts for the chronic nature of a disease.
  彼女かのじょは慢性まんせいの病気びょうきにかかっている。↗

  She suffers from a chronic malady.
• 慢性的まんせいてきCommon
  na-adjectiveThe adjectival counterpart of 慢性, for the broader sense of 'chronic': a problem or state that persists over a long time, often beyond illness, such as chronic fatigue or a chronic shortage.
  慢性的まんせいてきな便秘べんぴで苦くるしんでいます。↗

  I'm suffering from chronic constipation.

Use 慢性 for the medical sense, a long-lasting illness as opposed to an acute one; use 慢性的 for the broader adjective describing any problem or state that persists over a long period.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 慢性まんせいchronic (illness)
• 慢性的まんせいてきchronic
• 恒常的こうじょうてきconstant