Sentence:  Then, Warwick, thus: our sister shall be Edward's; / And now forthwith shall articles be drawn / Touching the <WSD>jointure</WSD> that your king must make, / Which with her dowry shall be counterpoised. 
Meaning of the word marked with <WSD> tags:  An estate settled on a wife, which she is to enjoy after her husband's death, for her own life at least, in satisfaction of dower.