不轨

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

他行为轨, 败坏了学校的声誉。

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

这男孩的轨行为,使他的母亲许多安眠。

Don't harbor unkind thoughts.

要心轨。

Their talk was slightly malicious.

他们的有点儿心轨。