shrouded > hidden
6 She stayed: with that he crawled out of his nest,
stayed > desisted, held back
7 Forth creeping on his caitiff hands and thighs,
caitiff > wretched, despicable; servile
8 And, standing stoutly up, his lofty crest
stoutly > boldly, bravely crest > [plumes on his hat]
9 Did fiercely shake, and rouse, as coming late from rest.
rouse > shake (used of a hawk shaking its feathers); rise (of gamebirds flushed from cover); rouse (in the modern sense) as > [as if]
203.36