Imprudence

Im*pru"dence (?), n. [L. imprudentia: cf. F. imprudence. Cf. Improvidence.] The quality or state of being imprudent; want to caution, circumspection, or a due regard to consequences; indiscretion; inconsideration; rashness; also, an imprudent act; as, he was guilty of an imprudence.

His serenity was interrupted, perhaps, by his own imprudence.
Mickle.