nevertheless nonetheless constrant limit

在词典里,neverthless和nonethless好象没什么区别,他们互为解释,意思都是然而,不过;尽管如此
第二个问题的单词你好象给错了,可能是constraint.
constraint:something that limits one's freedom of action.
limit:to keep within a certain size,amount,number,area,or place
从它们的意思就可以看出它们的区别了吧