dressed > dressed; arrayed (with armour, etc.)
2 For every shape on him he could endue:
endue > put on (as a garment)
3 Then like a king he was to her expressed,
expressed > portrayed
4 And offered kingdoms to her in view,
in view > in her view; or, lacking the final comma: with the object, hence: to prevail upon her
5 To be his leman and his lady true:
leman > lover, mistress
6 But when all this he nothing saw prevail,