stoutly > bravely, resolutely
3 Where no gate they found them to withhold, 4 Nor ward to wait at morn and evening late:
ward to wait > [a] sentinel to keep watch
5 But in the porch (that did them sore amate)
amate > daunt (cf. Rinaldo 5.58-61, GL 8.34-5)
6 A flaming fire (mixed with smouldry smoke,
smouldry > {Smothery, tending to smother}
7 And stinking sulphur, that with grisly hate
grisly > horrible, fearsome
8 And dreadful horror did all entrance choke) 9 Enforced them their forward footing to revoke.