4 stryfull > strife-full 1609
1 Which to avenge on him they dearly vowed,
dearly > earnestly
2 Wherever on ground they might him find;
on ground > in the world (though Guyon is of course literally "on ground")
3 False Archimago provoked their courage proud, 4 And strifeful Atin in their stubborn mind
Atin > (See 204.42:5) stubborn > hard, unyielding
5 Coals of contention and hot vengeance tinded.
tinded > inflamed, ignited
6 Now been they come where the palmer sat,