When etiology of a disease is unknown, the disease is to be ____?

When etiology of a disease is unknown, the disease is to be ____?

جب کسی بیماری کی ایٹولوجی معلوم نہ ہو تو بیماری کونسی ہونی چاہیے؟
Explanation

When the etiology of a disease is unknown, the disease is termed idiopathic.

This term indicates that the cause of the disease cannot be determined despite investigation.