Sentence:  Horace has been crippled by being set off against the 'sincerity' and 'spontaneity' of these two; when it comes to the Greek lyricists, the dice are even more <WSD>loaded</WSD> against our poet, for the Greeks have not only spontaneity and sincerity on their side, but a phalanx of yet more formidable allies .... 
Meaning of the word marked with <WSD> tags:  a die or dice being Weighted asymmetrically, and so biased to produce predictable throws.