imbecile

American  

[im-buh-sil, -suhl, -seel] / ˈɪm bə sɪl, -səl, -ˌsil /

noun

1. Informal. a dunce; blockhead; dolt.

   Don't stand there like an imbecile. Open the door!

2. Psychology. (no longer in technical use; now considered offensive) a person of the second order in a former and discarded classification of intellectual disability, above the level of idiocy, having a mental age of seven or eight years and an intelligence quotient of 25 to 50.

---

adjective

1. Informal. stupid; silly; absurd.

2. Usually Offensive. showing mental feebleness or incapacity.

3. Archaic. weak or feeble.

imbecile British  

noun

1. psychol a person of very low intelligence (IQ of 25 to 50), usually capable only of guarding himself against danger and of performing simple mechanical tasks under supervision

2. informal an extremely stupid person; dolt

---

adjective

1. of or like an imbecile; mentally deficient; feeble-minded

2. stupid or senseless

   an imbecile thing to do

Other Word Forms

• imbecilely adverb
• imbecilic adjective
• imbecility noun

Etymology

Origin of imbecile

First recorded in 1540–50; earlier imbecill, from Latin imbēcillus “weak”; -ile replacing -ill by confusion with suffix -ile

Explanation

If your best friend calls you an imbecile, he's implying that you're stupid, and he's probably pretty angry with you. An imbecile is an extremely stupid person. The noun imbecile is used informally as an insult to mean "fool". Its origins are in the Latin word imbecille, "weak or feeble," and it was an official medical term for people with a specific (and low) I.Q. in the 19th and early 20th centuries. Patients who were classified as imbeciles were said to have no more intelligence than a seven year-old child.

Example Sentences

But I will say you know, the Beatles wrote "Helter Skelter" and it's not their fault that some imbecile used it incorrectly.

From Salon • Aug. 30, 2022

“That was the message that the universe was shouting at us loud and clear. And it would’ve taken an imbecile to ignore that market message,” Needham said.

From Washington Post • Mar. 2, 2021

But he went on to add, “John Dingell was not exactly a wallflower. John Dingell called the president an imbecile in his closing months.”

From Washington Times • Dec. 22, 2019

Recalling that she appeared on the first season, Manigault Newman reflects: “I would look like the biggest imbecile alive for supporting a man who used that word.”

From The Guardian • Aug. 10, 2018

He looks at me like I’m an imbecile for asking.

From "Challenger Deep" by Neal Shusterman