unintentional, unplanned, unwitting -- (not done with purpose or intent; "an unintended slight"; "an unintentional pun"; "the offense was unintentional"; "an unwitting mistake may be overlooked")
unwitting -- (not aware or knowing; "an unwitting subject in an experiment")
ignorant, unknowledgeable, unknowing, unwitting -- (unaware because of a lack of relevant information or knowledge; "he was completely ignorant of the circumstances"; "an unknowledgeable assistant"; "his rudeness was unwitting")
(Sound)
