3 Neither ladies' loves, nor sweet entreaties might
might > could
4 Appease his heat, or hasty passage stay;
Appease > Assuage heat > fit of passion
5 For he has vowed to be avenged that day 6 (That day itself him seemed all too long)
him seemed > [seemed to him]
7 On him that did Pyrochles dear dismay:
dear > grievously (adv.); dear, beloved (adj.) dismay > defeat, overcome
8 So proudly pricks on his courser strong,
pricks on > spurs on