4 Whom ravenous hunger did thereto constrain:
thereto > to that [roaring]
5 Then gan he toss aloft his stretched train,
gan > did train > tail
6 And therewith scourge the buxom air so sore,
therewith > with it buxom > yielding, pliant
7 That to his force to yield it was fain;
fain > obliged
8 Neither aught his sturdy strokes might stand before,
aught > anything sturdy > recklessly violent might stand before > could withstand