Answer:
having or showing sharp powers of judgment; astute.
Explanation:
All of the nouns used (hammer, chain, furnace, brain, anvil) are explaining mighty things that the tiger is being compared to. The poem is simply saying that they are smart, speedy, and strong.
I hope this helped! If you have further questions don't be afraid to ask!
~Travis
"Because she loves them" is a sentence fragment.
