3 At last he came to an iron door 4 That fast was locked, but key found not at all
fast > firmly
5 Amongst that bunch to open it withal;
withal > therewith
6 But in the same a little grate was pight,
grate > grating, grille pight > placed
7 Through which he sent his voice, and loud did call 8 With all his power, to weet if living wight
weet > find out wight > person
9 Were housed therewithin, whom he enlarge might.
enlarge > set free