dunderheaded
Thick as bricks
Dunderheaded means stupid or dim-witted, from dunderhead—a blockhead or fool.
The word has an old-fashioned, almost comical ring to it: What dunderheaded fool left the gate open?
It conveys exasperation more than genuine insult.
Lacking mental acuity
- doltishSlow and dense
- thickHaving great depth
- brainlessDevoid of intelligence
- idioticExtremely lacking intelligence
boneheaded · blockheaded · thickheaded · dense · slow-witted · dull-witted · simple-minded · witless
Lacking any understanding
- obliviousLacking any awareness
- unawareLacking knowledge of something
- obtuseLacking mental sharpness
- imperceptiveFailing to notice things
uncomprehending · unseeing · blind · ignorant · uninformed · unwitting · insensible · unperceptive
Lacking good sense
- sillyFrivolous or absurd
- asinineExtremely foolish or stupid
- inaneLacking sense or meaning
- senselessLacking reason or awareness
nonsensical · absurd · ridiculous · harebrained · cockamamie · dopey · goofy · scatterbrained
dimwitted
Lacking mental acuity
idiotic · boneheaded · blockheaded · thickheaded · dense · slow-witted · dull-witted · simple-minded · witless · numbskulled
clueless
Lacking any understanding
imperceptive · uncomprehending · unseeing · blind · ignorant · uninformed · unwitting · insensible · unperceptive · heedless
foolish
Lacking good sense
senseless · nonsensical · absurd · ridiculous · harebrained · cockamamie · dopey · goofy · scatterbrained · thoughtless