witless

1 ENTRIES FOUND:
witless /ˈwɪtləs/ adjective
witless
/ˈwɪtləs/
adjective
Britannica Dictionary definition of WITLESS
[more witless; most witless]
1 
: very foolish or stupid
2 
not used before a noun, informal : very much : very badly — used for emphasis

— witlessly

adverb

— witlessness

noun [noncount]