words fail me idiom
（尤指因刚见到或刚被告知的事）惊得说不出话来，不知说什么好
said to emphasize your surprise or shock, especially at something you have just seen or been told
"So what did you think of Olive's pink outfit?" "Words fail me. I've never seen anything quite like it!" “那么你觉得奥利芙的那套粉色衣服怎么样？”“我都不知道说什么好，我从没见过那样的东西！”