shroud > conceal

5 She heard a shrilling trumpet sound aloud, 6 Sign of nigh battle, or got victory; 7 Naught therewith daunted was her courage proud,

therewith > with that courage > spirit

8 But rather stirred to cruel enmity, 9 Expecting ever when some foe she might descry.

Expecting ever > Waiting continuously when > [for the time when]

312.2

With that, an hideous storme of winde arose,
2 With dreadfull thunder and lightning atwixt,
And an earth-quake, as if it streight would lose
4 The worlds foundations from his centre fixt;
A direfull stench of smoke and sulphure mixt
6 Ensewd, whose noyance fild the fearefull sted,
From the fourth houre of night vntill the sixt;
8 Yet the bold Britonesse was nought ydred,
Though much emmou'd, but stedfast still perseuered.

1 With that, a hideous storm of wind arose,

hideous > terrific; hence: violent (cf. 101.6:6)

2 With dreadful thunder and lightning atwixt,