INADVERTENT

adj. 1 unintentional, unintended, unpremeditated, accidental, unthinking, unwitting, chance; unconscious, unplanned, unstudied, undesigned, uncalculated She was an inadvertent witness to the murder I assure you that the error was entirely inadvertent. 2 careless, inattentive, negligent, heedless, unobservant Inadvertent commentators failed to see the significance of her words