scare/frighten someone witless

US /skɛr/ˈfraɪtən ˈsʌmˌwʌn ˈwɪtlɪs/
UK /skɛr/ˈfraɪtən ˈsʌmˌwʌn ˈwɪtlɪs/
"scare/frighten someone witless" picture
1.

to frighten someone so much that they are unable to think clearly or act sensibly

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The sudden loud noise scared him witless.
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The ghost story frightened the children witless.
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scare someone shitlessfrightenedfrightenfrighteningscaredscarefrighten someone out of their wits