不轨

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

他行为轨, 败坏了学校声誉。

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

这男轨行为,使他母亲许多夜得安眠。

Don't harbor unkind thoughts.

要心轨。

Their talk was slightly malicious.

他们谈话有点儿心轨。