disdain > indignation, anger affronted > defied; confronted
3 Enforced her purple beast with all her might
Enforced > Encouraged; constrained
4 That stop out of the way to overthrow,
stop > obstacle [the squire]
5 Scorning the let of so unequal foe:
let > hindrance so > such [an]
6 But nathemore would that courageous swain
nathemore > never the more swain > youth, young man
7 To her yield passage, gainst his lord to go,