Fra Silvestro, the imbecile, was the first taken to the scaffold.
"Mad, of course, that's to say imbecile," repeated the rubicund man.
He shook his head, as one who listens to the vaporings of an imbecile, but turned to obey.
He felt he had been wakened once too often by their imbecile quarrelling.
You may think that I had been singularly lacking in suspiciousness; you may consider me even to have been an imbecile.
For about six seconds I stood there like an imbecile, grinning amiably.
Rocking from side to side, reeling across the road and back, trumpeting in imbecile inexpressive tones, Zenobia advanced.
But he is not imbecile and pig; for he has seen, and Don Jorge has seen; and why?
You tried to fix it on the imbecile because you knew that he could not suffer.
You try to bunco me and now you conspire with an imbecile to humble me into the dust.
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.