Not prudent; wanting in prudence or discretion; indiscreet; injudicious; not attentive to consequence; improper.

not prudent or wise; "very imprudent of her mother to encourage her in such silly romantic ideas"; "would be imprudent for a noneconomist to talk about the details of economic policy"- A.M.Schlesinger

lacking wise self-restraint; "an imprudent remark"