&TOµos, from a-, privative, and TEµvEw, to cut) until the middle of the 19th century, when a differentiation was established.
a-, privative, and O€6, God), literally a system of belief which denies the existence of God.
it-, privative, and g pyov, work; hence meaning "inert"), a gaseous constituent of atmospheric air.
a-, privative, and 06Aj, right of seizure), a place of refuge.
Plato proceeds to explain by his principle of difference both privative and negative predicates, and also the possibility of false predication.