idiopathy

noun

Etymology: From Latin idiopathia, from Ancient Greek ἰδιοπάθεια (idiopátheia). By surface analysis, idio- + -pathy. First appears c. 1634, in the publications of Philiatreus (fl. 1630).

1. A disease or condition arising spontaneously or having no known cause.

   “The sterilization that was first conceived as a recourse of limited medical reach came to be considered an efficient eugenical procedure that could prevent descendents^([sic]) with hereditary and transmissible disorders, such as mental deficiency, epilepsy, idiopathies, etc.”