Fra Silvestro, the imbecile, was the first taken to the scaffold.
I do not know whose heads are criminal, but I think I know whose are imbecile.
He shook his head, as one who listens to the vaporings of an imbecile, but turned to obey.
A man, aged 22, the son of an inebriate, with one imbecile sister.
You may think that I had been singularly lacking in suspiciousness; you may consider me even to have been an imbecile.
He spent a whole evening measuring this imbecile's facial angle.
Rocking from side to side, reeling across the road and back, trumpeting in imbecile inexpressive tones, Zenobia advanced.
He flew into a passion, disowned his discovery, and called himself an imbecile.
You tried to fix it on the imbecile because you knew that he could not suffer.
He did not answer, but the other imbecile, Josiah, answered for him.
1540s, imbecille "weak, feeble" (especially in reference to the body), from Middle French imbecile (15c.), from Latin imbecillus "weak, feeble" (see imbecility). Sense shifted to mental weakness from mid-18c. As a noun, "feeble-minded person," it is attested from 1802. Traditionally an adult with a mental age of roughly 6 to 9 (above an idiot but beneath a moron).
imbecile im·be·cile (ĭm'bə-sĭl, -səl)
A person of moderate to severe mental retardation having a mental age of from three to seven years and generally being capable of some degree of communication and performance of simple tasks under supervision. The term belongs to a classification system no longer in use and is now considered offensive.