again > in return
2 With so fierce fury and great puissance
so > such puissance > force
3 That through his three-square scutcheon piercing quite,
three-square > equilaterally triangular scutcheon > escutcheon, shield
4 And through his mailed hauberk, by mischance
hauberk > {Military tunic, usu. of chain-mail}
5 The wicked steel through his left side did glance;
glance > dart, shoot (esp. obliquely)
6 Him, so transfixed, she before her bore