beast > [horse]

7 But follows her far off (nor aught he fears)

aught > anything at all

8 To be partaker of her wandering woe,

partaker of > [a] participant in

9 More mild, in beastly kind, than her beastly foe.

beastly > animal, beast-like kind > nature beastly > vile, despicable

CANTO IIII

To sinfull house of Pride, Duessa
2 guides the faithfull knight,
Where brothers death to wreak Sansioy
4 doth chalenge him to fight.

1 To sinful House of Pride Duessa 2 guides the faithful knight; 3 Where, brother's death to wreak, Sansjoy