What does imbecile mean?
An imbecile is, in modern English, a highly insulting term for someone considered extremely stupid or intellectually weak. It can also function as an adjective meaning foolish or intellectually feeble. The word is strongly derogatory, and its bluntness can make it more insulting than milder expressions such as 'fool' or 'idiot'. Historically, it referred more broadly to a person or thing considered weak, feeble, or incapable, but its meaning has long been dominated by the idea of extreme stupidity. The adjective form 'imbecilic' and the related noun 'imbecility' are also available, though they are generally formal or archaic in tone. In careful or professional writing, a precise neutral term such as 'unwise', 'foolish', 'incompetent', or 'illiterate' is normally preferable, with the choice depending on exactly what is being criticized.
A person regarded with contempt as extremely stupid or intellectually weak.
"The mistake could only have been made by an imbecile."
Strongly derogatory and normally unsuitable for formal or respectful language.
Extremely stupid or foolish.
"The plan was rejected as imbecilic."
Also strongly derogatory and now less common than the noun.
The usual plural form, used when referring to more than one person regarded in this derogatory way.
"The novel portrays the rulers as drunken imbeciles."
What began as a reference to physical weakness became one of the English language's bluntest labels for a supposedly stupid person.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does imbecile come from?
The word comes through French from Latin imbecillus, meaning 'weak' or 'feeble'. It entered English in the early 16th century, initially with physical weakness and inadequacy among its meanings. Its sense developed toward mental deficiency and, eventually, the strongly insulting modern meanings. The root also produced forms such as 'imbecillity', 'imbecillitude', and 'imbecillous'.
Related word forms
How imbecile is actually used
The noun and adjective are both strongly derogatory and should normally be avoided in formal, professional, or respectful language. The adjective is relatively uncommon compared with the noun; neutral alternatives include 'foolish', 'unwise', or 'incompetent', depending on the intended criticism.
Easily confused with imbecile
An imbecile is a person insultingly described as stupid, whereas an incompetent person is unable to perform a task or role effectively.