graffiti-涂鸦
具体用法看例句：
Many were quick to blame the morality police that theregime had sent back onto the streets. Anti-regime  graffiti  is backon the walls. In a sign of nervousness, the regime is said to havepulled its morality squads from the subways in recent days andasked guards to allow unveiled women to enter governmentpremises.许多人迅速指责政权重新派出道德警察上街。反对政权的涂鸦再次出现在墙上。作为紧张局势的迹象，据说政权最近几天已将道德警察队伍从地铁中撤出，并要求卫兵允许未戴头纱的妇女进入政府场所。
摘自《经济学人》20231006期-A woman described asIran's "Nelson Mandela' wins the Nobel peace prize