overstep

The judges overstepped their authority. [=the judges did something that they are not allowed to do]这些法官越权了。

He overstepped the bounds/limits of good taste. [=he did something that was not proper]他文雅过度而变得庸俗了。

She warned us not to overstep the mark/line. [=do something that is not proper or allowed]她警告我们不要越轨。