Based on the context of each excerpt from "The Fish" by Elizabeth Bishop, choose the word that most closely matches the denotation of the bolded word.
to become dull or spoiled after
dirty water that collects in corners
to become unraveled at the end
A green line, frayed at the end
where he broke it, two heavier lines,
the irises backed and packed
with tarnished tinfoil
seen through the lenses
of old scratched isinglass.
and victory filled up
the little rented boat,
from the pool of bilge
where oil had spread a rainbow