STUPIDITY
stupidity, betise, folly, foolishness, imbecility
(noun) a stupid mistake
stupidity
(noun) a poor ability to understand or to profit from experience
Source: WordNet® 3.1
Etymology
Noun
stupidity (countable and uncountable, plural stupidities)
(uncountable) The property of being stupid.
(countable) An act that is stupid.
Synonyms
• dumbness
• unintelligence
• idiocy
Source: Wiktionary
Stu*pid"i*ty, n. Etym: [L. stupiditas: cf. F. stupidité.]
1. The quality or state of being stupid; extreme dullness of
perception or understanding; insensibility; sluggishness.
2. Stupor; astonishment; stupefaction. [R.]
A stupidity Past admiration strikes me, joined with fear. Chapman.
Source: Webster’s Unabridged Dictionary 1913 Edition