at the last > finally
5 Which, through the wood loudly bellowing, did rebound, 6 That all the earth for terror seemed to shake,
That > [So that]
7 And trees did tremble. The Elf, therewith astounded,
therewith > with that astounded > amazed, confounded
8 Upstarted lightly from his looser make,
Upstarted > Started up lightly > quickly looser > looser (in the modern moral sense); also: too-loose make > companion, mate
9 And his unready weapons began in hand to take.
107.8
But ere he could his armour on him dight,
2 Or get his shield, his monstrous enimy
With sturdie steps came stalking in his sight,
4 An hideous Geant horrible and hye,
That with his talnesse seemd to threat the skye,
6 The ground eke groned vnder him for dreed;
His liuing like saw neuer liuing eye,
8 Ne durst behold: his stature did exceed
The hight of three the tallest sonnes of mortall seed.