old man > (This compound word can be taken here in its literal sense and as a synonym for unregenerate human nature, as in "Old Adam")
3 That on a staff his feeble steps did frame,
frame > give shape to, direct
4 And guide his weary gait both to and fro: 5 For his eyesight him failed long ago, 6 And on his arm a bunch of keys he bore, 7 Which, unused, rust did overgrow: 8 Those were the keys of every inner door, 9 But he could not them use, but kept them still in store.
still > yet; stationary (i.e. unused, unturned)
108.31
But very vncouth sight was to behold,
2 How he did fashion his vntoward pace,
For as he forward moou'd his footing old,
4 So backward still was turnd his wrincled face,
Vnlike to men, who euer as they trace,
6 Both feet and face one way are wont to lead.
This was the auncient keeper of that place,
8 And foster father of the Gyant dead;
His name Ignaro did his nature right aread.
1 But very uncouth sight was to behold
uncouth > strange, unseemly was > [it was]
2 How he did fashion his untoward pace,