(especially of a positive feeling) not spoiled by any amount of negative feeling; pure(尤指积极的情感)纯真的,纯粹的
Spending time with one's family is never an unalloyed pleasure (= there are bad things about it too).和家人在一起时从来不会只有快乐、没有烦恼。
We had the perfect holiday - two weeks of unalloyed bliss.我们度过了完美的假期——两周逍遥快活的时光。