Imbecility

Im`be*cil"i*ty (?), n.; pl. Imbecilities (#). [L. imbecillitas: cf. F. imbécillité.] The quality of being imbecile; weakness; feebleness, esp. of mind.

Cruelty . . . argues not only a depravedness of nature, but also a meanness of courage and imbecility of mind.

☞ This term is used specifically to denote natural weakness of the mental faculties, affecting one's power to act reasonably or intelligently.

Syn. -- Debility; infirmity; weakness; feebleness; impotence. See Debility.