idiopathy

idiopathy is a   Noun

Definition:

[1] A peculiar, or individual, characteristic or affection. All men are so full of their own fancies and idiopathies, that they scarce have the civility to interchange any words with a stranger. Dr. H. More.

[2] A morbid state or condition not preceded or occasioned by any other disease; a primary disease.

Synonyms: