不轨

His bad behaviour has tarnished the good name of the school.

他行为不轨, 败坏了学校的声誉。

The boy’s misconduct cost his mother many sleepless nights.

这男孩的不轨行为,使他的多夜不得安眠。

Don't harbor unkind thoughts.

不要不轨。

Their talk was slightly malicious.

他们的谈话有点不轨。