Why was "tantrum" trending last week?
1901, a hybrid from comb. form of nature + -pathy. A correct formation from all-Greek elements would be *physiopathy. Related: Naturopath.
naturopathy na·tur·op·a·thy (nā'chə-rŏp'ə-thē)n. A system of therapeutics in which neither surgical nor medicinal agents are used, with dependence being placed only on natural remedies.