un-American
adjective US disapproving uk/ˌʌn.əˈmer.ɪ.kən/ us/ˌʌn.əˈmer.ɪ.kən/
非美国的;反美的
guilty of activities, behaviour, or beliefs that show opposition or no loyalty to the US and its political system
From 1940 to 1943, he was general counsel of the House committee investigating un-American activities. 1940年至1943年，他是众议院非美活动调查委员会的法律总顾问。