Sentence:  ... But, wroth because this man in full assembly, / Came and reviled thee, thou wouldst shew thy <WSD>prowess</WSD>, / The <WSD>prowess</WSD> that attends thee, that henceforth / Not e'er a man might think to scorn thy <WSD>prowess</WSD>, ... 
Meaning of the word marked with <WSD> tags:  Distinguished bravery or courage, "especially" in battle; heroism.