Imprudence
Imprudence , noun
[Latin imprudentia: compare French imprudence. Compare 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.