impudent

1. ADJ If you describe someone as impudent, you mean they are rude or disrespectful, or do something they have no right to do. 放肆的; 不恭的[正式]

Some of them spoke pleasantly and were well behaved, while others were impudent and insulting. 他们当中的一些人谈吐不俗、举止得体，而另一些人则行为不恭、傲慢无礼。