Sentence:  Maxentius and his men were bundled over the low walls, plunging into spume and gore, dragged down by their armour to perish in icy roils of rivermud: – outflanked, out-thought, <WSD>outbutchered</WSD>, by a golden-haired braggart Apollo in a blaze of piety. 
Meaning of the word marked with <WSD> tags:  To slaughter more people than.