Sentence:  In establishing his ideal state he expressed some opinions utterly <WSD>abhorrent</WSD> to our customs and ways of living. He believed, for instance, that all wives should be held in common ... with the result that no one could tell his own children from those of a perfect stranger. 
Meaning of the word marked with <WSD> tags:  Contrary to something; discordant. (Mid 17th century.)<ref name=SOED/>