appeached > shamed, dishonoured
3 And inward grief, he fiercely gan approach,
gan > did
4 Resolved to put away that loathly blame,
put away > dispel, put an end to loathly > loathsome, hateful
5 Or die with honour and desert of fame;
desert > merit, reward
6 And on the hauberk struck the prince so sore
hauberk > {Chain-mail tunic; chain-mail covering for neck and shoulders} sore > grievously
7 That quite disparted all the linked frame,