1. (a.) Not prudent; not discreet; ill advised.

2. (a.) Done without due consideration; wanton; rash; inconsiderate; as, an unadvised proceeding.

automatic brash casual gut hasty hotheaded ill-advised ill-considered ill-contrived ill-devised ill-gauged ill-judged impolitic imprudent inadvertent inadvisable inconsiderate indeliberate indiscreet inexpectant inexpedient injudicious insensate involuntary irrational mindless misadvised misguided myopic nonexpectant reasonless reckless reflex reflexive senseless shortsighted snap spontaneous thoughtless unadmonished unanticipating unanticipative unaware uncalculated unconscious unconsidered undeliberate undeliberated undesigned undiscerning unexpecting unforeseeing unforewarned unguessing uninformed unintended unintentional unmeditated unpremeditated unprepared unready unreasonable unreflecting unreflective unseeing unsensible unsound unstudied unsuspecting unthinking unthoughtful unwarned unwilled unwise witless