虚伪的用英语可以说是 hypocritical。这个词来源于希腊语，有“以嘴巴虚饰心意”之意。例句：

His hypocritical smile made me feel uncomfortable. （他那虚伪的笑容让我感到不自在。）

She accused him of being hypocritical and insincere. （她指责他虚伪和不真诚。）

He always pretends to be a devout Christian, but his hypocritical behavior shows that he is not sincere. （他总是假装是虔诚的基督徒，但他虚伪的行为表明他并不真诚。）