Of or like an ass; esp., having qualities regarded as characteristic of asses; stupid, silly, obstinate, etc.
The definition of crazy is someone or something that is insane or not mentally sound.
Intellectually weak or obtuse; stupid.
Conspicuously unintelligent; stupid:
Without good sense; silly; unwise
Not sane; mentally ill or deranged; demented; mad
The definition of fatuous is foolish or silly.
Easy to understand, do, or carry out:
Slow to learn or understand; obtuse.
(of especially persons) lacking sense or understanding or judgment
Find another word for witless. In this page you can discover 30 synonyms, antonyms, idiomatic expressions, and related words for witless, like: asinine, crazy, dull, dumb, foolish, inane, insane, brainless, fatuous, insensate and mindless.