veneer
vɪəˈnɪə noun
2
a veneer of politeness/sophistication etc
behaviour that hides someone’s real character or feelings [正式] 〔掩饰真实性格或感情的〕彬彬有礼/世故等的伪装 formal
表面的礼貌掩盖了布赖德夫人越来越强烈的怒火。