Please help me I just am a little confused.
"Old longings nomadic leap,
Chafing at custom's chain
Again from its brumal sleep
Wakens the ferine strain."

What word does “nomadic” modify if it is being used as an adjective?

What word does “nomadic” modify if it is being used as an adverb?

Explain how the meaning of the line changes depending on which word “nomadic” describes.