deteriorator

Athletic sports are not of necessity conducive to long life, even if they are to temporary robust health; but there is no mistaking the fact that the sedentary and in-door life of the average Jew is a deteriorator to health and life, and especially among that class of families who are poor and keep no servant; from heredity and home education having adopted unhygienic customs, in which they have grown up, -- in these a total disregard for all ventilation forms a part.

History of Circumcision from the Earliest Times to the Present Moral and Physical Reasons for its Performance Peter Charles Remondino 1886

_man_ left to the freedom of his own will that is the deteriorator of man.

The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed Hugh Miller 1829