im·pru·dence /(ˌ)ɪmˈprudṇ(t)s/
  輕率,不小心,不謹慎
  Im·pru·dence n.  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.
  ◄ ►
  imprudence
       n : a lack of caution in practical affairs [ant: prudence]