idiopathy /ˌidēˈäpəTHē, ˌɪdiˈɑpəθi 
/ ▸ noun (plural idiopathies)
Medicine a disease or condition which arises spontaneously or for which the cause is unknown. – ORIGIN late 17th century : from modern Latin idiopathia, from Greek idiopatheia, from idios ‘own, private’ + -patheia ‘suffering’.
EnglishOxford New American Dictionary
