Sentence:  A beautiful great lady, past her prime, / Behold her dreaming in her easy chair; / Grey robed, and veiled, in laces old and rare, / Her smiling eyes see but the vanished time / Of splendid <WSD>prowess</WSD>, and of deeds sublime. 
Meaning of the word marked with <WSD> tags:  Distinguished bravery or courage, "especially" in battle; heroism.