RALPH: Prodigious derives from the latin word, prōdigium, which meant an omen, an unusual occurrence which foretold the future.

SARAH: Later it came to mean anything amazing; but in modern usage, prodigious means something amazingly large – for example the prodigious output of a writer.

RALPH: In Shakespeare’s day, prodigious was often used in the negative sense of grotesque or unnatural, and that’s how he’s using it here.