imbécil

Etymology
From, from + , in the sense of “weak, vulnerable”.

Adjective

 * 1)  dumb, having the properties of an imbecile

Noun

 * 1)  imbecile, moron, dimwit, nitwit, sucker, dolt, shithead, nincompoop
 * 2)  asshole, prick, jerk, dickhead, twit, twerp, schmuck

Usage notes

 * Although in some contexts, , , , , , , imbécil, and  may be synonyms, in most contexts have a different degree, zonzo having the mildest connotation, increasing its intensity in that rough order, to estúpido and pendejo, which have the most offensive sense.