The phrase "wouldst will not" is an archaic form of saying "you would not want to" or "you don't wish to." There are several synonyms for this phrase, such as "refuse," "decline," "reject," and "object." These words all convey the idea of someone choosing not to do something. Other synonyms include "abstain," "avoid," "eschew," and "shun," which suggest a deliberate act of staying away from something. In modern language, saying "you wouldn't" or "you'd rather not" also conveys the same sentiment. Whatever synonym you choose, the idea is the same - someone is unwilling to do something.