imbecility

imbecility
/ˌɪmbəˈsɪlətɪ; ˌɪmbə`sɪlətɪ/ n
1 [U] stupidity 愚蠢.
2 [C] stupid act, remark, etc 愚蠢的行为、 言语等.

牛津英汉双解词典