imprudency

The fact or quality of being imprudent; rashness.

An imprudent act.

[T]he rival and the admirer would certainly avoid amending imprudencies, by which they were both equally likely to profit.

I now most seriously do assure my Reader that she was entirely innocent; having never been guilty of anything more than Imprudencies into which she was betrayed by the openness of her Heart, her Youth, and her Education.