imbecility
im·be·ci·lity
noun
1.
retardation more severe than a moron but not as severe as an idiot
Origin
From Middle English inbecillite, from Middle French imbecilité, imbecillité, and its etymon Classical Latin imbēcillitās. By surface analysis, imbecile + -ity.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.