unalloyed
US /ˌʌn.əˈlɔɪd/
UK /ˌʌn.əˈlɔɪd/
1.
không hợp kim
(especially of a positive feeling) not spoiled by any amount of negative feeling; pure:
:
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Spending time with one's family is never an unalloyed pleasure (= there are bad things about it too).