un-American /ˌʌnəˈmerɪkən/ adjective Learner's definition of UN-AMERICAN
: not agreeing with American values, principles, or traditions非美国的；不符合美国价值观（或原则、传统）的 -
If you ask me, failing to vote is downright un-American.依我说，不去投票是极不符合美国传统的做法。
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They were accused of un-American activities.他们被指控从事反美活动。