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Dumb as a doornail
Adjective
Definitions
1.
Adjective
Irrefutably or unquestionably dumb.
Synonyms
dumb as dirt
dumber than a bag of hammers
dumber than a box of rocks
dead as a dodo
deader than a doornail
duncical
duncy
dumb
dullardly
dunderpated
dull as ditchwater
dunderheaded
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