Sentence:  And nothing 'gainst Time's <WSD>scythe</WSD> can make defence / Save breed, to brave him when he takes thee hence. 
Meaning of the word marked with <WSD> tags:  An instrument for mowing grass, grain, etc. by hand, composed of a long, curving blade with a sharp concave edge, fastened to a long handle called a snath. (before 10th century)