ㄏㄨㄢˊhuánㄨㄟˋwèi

  1. 宮廷守衛軍隊陸贄〉:重門結草環衛誰何。」·無名氏連環計·》:家奴自拔來歸可以驃騎大將軍羽林環衛。」

public cleanliness, (urban)​ sanitation, environmental sanitation, abbr. for 環境衛生[huan2 jing4 wei4 sheng1]
Umwelthygiene