bent > inclined
3 As those you blame, yet may it naught appease
blame > reprove naught > not at all
4 My raging smart, nor aught my flame relent,
smart > pain, suffering aught > at all, in any way relent > lessen, abate
5 But rather does my helpless grief augment. 6 For they, however shameful and unkind,
unkind > unnatural
7 Yet did possess their horrible intent:
possess > [take possession of] intent > intention
8 Short end of sorrows they thereby did find; 9 So was their fortune good, though wicked were their mind.