만성 질환이 · 만성 질환을
chronic disease, chronic illness
Example
당뇨병은 대표적인 만성 질환이에요.
Diabetes is a typical chronic disease.
Word parts
만 slow+성 nature+질 disease+환 illness
Literally 'slow-natured illness.'
Good to know
질환 is pronounced [질환]; the ㅎ is kept in standard pronunciation.
Related words