Which words are used to describe the strength of the blacksmith?
The blacksmith is described in the second stanza as a "mighty" man with "large" and "sinewy" hands. His arm muscles are likened to "iron bands." In the fourth stanza, we learn that he swings "his heavy sledge" in a slow and measured way: such a sledge (a heavy hammer) would take a good deal of upper-body strength to lift and repeatedly pound with, as he does.
The blacksmith is an idealized figure who is both strong and good, and we can visualize him as a symbol of strength, with his massive upper-body muscles, black hair, and solid hands. He is not so much a distinct individual as a representative of the hardworking laborer who toils with great integrity and without complaint.
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