From Longman Dictionary of Contemporary Englishwitlesswit‧less /ˈwɪtləs/ adjective 1 → be scared witless2 STUPID/NOT INTELLIGENTnot very intelligent or sensible SYN stupid —witlessly adverb —witlessness noun [uncountable]
Examples from the Corpus
witless• No, I lie, not frightened - just terrified witless.• Time was when the Richardson clan could scare this area witless.• The accident-prone Frank Spencer was just a step away from Runnicles, the witless bank clerk.• And your witless behaviour is causing me more trouble in the end.• Instead, it leads into a witless bridging sequence that connects a half-dozen individual drearily derivative fantasy and science-fiction stories.• Most of us, frankly, are witless dupes to nature when the question is a baby.• Frank's sharpness shines through at times, but David's ad-libs rarely rise above witless rubbish. 