C (愚蠢) 愚蠢 yu2chun3
foolish-stupid/ foolish/ stupid/ silly/ unintelligent/ dumb
dumm, töricht, blöd

D (愚昧) 愚昧 yu2mei4
fatuous/ benighted
beschränkt, unwissend, unaufgeklärt

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ngu xuẩn ngu muội

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Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

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愚* * + +
愚公移山* * + +
愚弄* * + +
愚人节* * + +

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from CC-CEDICT under a Creative Commons Attribution-Share Alike 3.0 License

愚' + 愚* * + to be s to cheat or deceive/ me or I (modest)