mar
verb [ T ] formal uk/mɑːr/ us/mɑːr/ -rr-
损坏；破坏；损伤
to spoil something, making it less good or less enjoyable
Sadly, the text is marred by careless errors. 很遗憾，这篇文章因一些粗心大意的错误而大为减色。
It was a really nice day, marred only by a little argument in the car on the way home. 这一天过得非常不错，只是回家路上在汽车里发生的一点儿口角令人扫兴。
I hope the fact that Louise isn't coming won't mar your enjoyment of the evening. 路易丝今晚不来了，我希望这不会使你扫兴。