Meaning of UNALLOYED in English

UNALLOYED

[adjective] [literary] - (esp. of a positive feeling) not spoilt by any amount of negative feeling; pureSpending time with one's family is never an unalloyed pleasure (= There are bad things about it too).We had the perfect holiday - two weeks of unalloyed bliss.

Cambridge English vocab.      Кембриджский английский словарь.