In medicine, a<unk> disease is a disease that is long-lasting or recurrent. The term<unk> describes the course of the disease, or its rate of onset and development.  A<unk> course is distinguished from a recurrent course; recurrent diseases relapse repeatedly, with periods of remission in between.  As an adjective,<unk> can refer to a persistent and lasting medical condition.<unk> ty is usually applied to a condition that lasts more than three months.
Chronic 
Acute 
Occult
Male
Malignant
Senile
Grief
Young adult 