[むち, muchi] (adj-na, n) ignorance; innocence; stupidity; (P) #16523
[ぐ, gu] (n, adj-na) (1) foolishness; silliness; stupidity; folly; (2) (arch) (hum) I; me; (P) #17420
[suttokodokkoi] (n, adj-na) idiot; fool; idiocy; stupidity
[paa] (n, adj-na) (1) (See じゃん拳) paper (in rock, paper, scissors); (2) disappearing completely; (3) foolishness; stupidity
[ハンロンのかみそり, hanron nokamisori] (n) (obsc) (See オッカムの剃刀) Hanlon's razor ("Never attribute to malice that which can be adequately explained by stupidity")
[majiboke] (n) (unintentionally comedic) stupidity
[おこのさた, okonosata] (n) stupidity; absurdity; presumption; impertinence
[あまくち, amakuchi] (adj-na, n, adj-no) (1) sweet flavour; sweet flavor; mildness; (2) flattery; (3) stupidity
[まぬけ, manuke] (adj-na, n) (uk) stupidity; idiot; dunce; blockhead; (P)
[ぐのこっちょう, gunokocchou] (exp) the height of folly; sheer stupidity
[ぐどん, gudon] (adj-na, n) (sens) stupidity; silliness
[ぐれつ, guretsu] (adj-na, n) foolishness; stupidity; silliness
[しゅしゅ, shushu] (n, vs) lack of innovation; stupidity
[ちどん, chidon] (adj-na, n) dullness; stupidity
[どんさい, donsai] (n) stupidity; dull person; dullness
[ぶま, buma] (adj-na, n) clumsiness; stupidity; blunder
[ぼんくら, bonkura] (n) (1) stupidity; idiocy; (2) blockhead; idiot; dimwit; mediocrity
[やぼてん, yaboten] (n) boorishness; coarseness; stupidity
[ろどん, rodon] (n) imbecility; stupidity