From > [From becoming the] of > [of the]
3 Her faithful guard removed, her hope dismayed, 4 Herself a yielded prey to save or spill.
spill > destroy
5 He, now lord of the field, his pride to fill,
He, now lord > (Or: He now, lord)
6 With foul reproaches and disdainful spite
disdainful > hateful; angry; contemptuous
7 Her vilely entertains and, will or nill,
entertains > treats will or nill > willy-nilly, will or will not
8 Bears her away upon his courser light: