joint > limb
4 For ruth of gentle knight so foul forlorn:
ruth > pity gentle > noble
5 Which shaking off, he rent that iron door
rent > tore
6 With furious force and indignation fell;
fell > fierce, terrible
7 Where entered in, his foot could find no floor, 8 But all a deep descent, as dark as hell, 9 That breathed ever forth a filthy baneful smell.
baneful > life-destroying, poisonous
108.40