Abrupt

• marked by sudden changes in subject and sharp transitions; "abrupt prose"
• exceedingly sudden and unexpected; "came to an abrupt stop"; "an abrupt change in the weather"
• extremely steep; "an abrupt canyon"; "the precipitous rapids of the upper river"; "the precipitous hills of Chinese paintings"; "a sharp drop"
• surprisingly and unceremoniously brusque in manner; "an abrupt reply"
• Something which is abrupt; To tear off or asunder; To interrupt suddenly; Broken off; very steep or craggy, as rocks, precipices, banks; precipitous; as, abrupt places; Without notice to prepare the mind for the event; sudden; hasty; unceremonious; Curt in manner; rude; uncivil; impolite.