Sentence:  Libanius's invective against Philip successively despises barbarian origins in and of themselves, mocks dependency, rebukes failure to learn cultural values, snidely notes <WSD>catamitism</WSD>, drowns practical achievements in the immorality alleged to have won them, and further damns character with accounts of unproductive vice[.] 
Meaning of the word marked with <WSD> tags:  The practice of keeping catamites.