Sentence:  “Come, Darcy,” said he, “I must have you dance. I hate to see you standing about by yourself in this stupid manner. You had much better dance.” ¶ “I certainly shall not. You know how I detest it, unless I am particularly acquainted with my partner. At such an assembly as this, it would be <WSD>insupportable</WSD>. Your sisters are engaged, and there is not another woman in the room, whom it would not be a punishment to me to stand up with.” 
Meaning of the word marked with <WSD> tags:  That cannot be tolerated or endured.