Foul'ness, n.

n. The quality of being foul; filthiness; defilement; pollution; hatefulness; ugliness; unfairness; dishonesty.

There is not so chaste a nation as this, nor so free from all pollution or foulness. Bacon.

The foulness of the infernal form to hide. Dryden.

Piety is opposed to hypocrisy and insincerity, and all falseness or foulness of intentions. Hammond.