Use 'anathema' to express a very strong aversion or negative feeling towards something. Dishonesty is anathema to him.
Pro Tip 2/3
Moral Opposition
It is often used to emphasize a principled opposition to something, not just a personal preference. Child labor is anathema to our organization's values.
Pro Tip 3/3
Intensity Emphasis
'Anathema' indicates a level of intensity that is greater than a simple dislike. Corruption should be anathema to every citizen.