Words fail me表达的是某人的惊讶与不相信，说不出话来，下面是Words fail me的用法：

So what did you think of Tom's pink outfit? Words fail me. I've never seen anything quite like it!

“那么你觉得奥利弗的粉红色衣服怎么样？“我说不出话来, 我从来没有见过像这样的东西！”