1 A lovely lady rode him fair beside,
lovely > lovely; loving; lovable [by virtue of her admirable qualities] fair > fittingly, becomingly; skilfully
2 Upon a lowly ass more white than snow, 3 Yet she much whiter; but the same did hide
the same > [her complexion she]
4 Under a veil, that wimpled was full low;
wimpled > {Falling in folds} full > very, exceedingly
5 And over all a black stole she did throw,
stole > robe
6 As one that inly mourned: so was she sad,
inly > inwardly