be lost for words
成語所屬單字lost
be lost for words — 慣用語
1. To be so surprised, shocked, or emotional that you cannot think of anything to s
1.慣用語
釋義
說不出話來（因極度驚訝、震驚或感動而一時無言以對）
To be so surprised, shocked, or emotional that you cannot think of anything to say.
例句
When Takeshi opened the gift and saw the watch his father had owned, he was lost for words.
The judge was lost for words when the defendant suddenly confessed to a crime nobody knew about.