abrupt (Adjective) — Marked by sudden changes in subject and sharp transitions. ex. "abrupt prose"
abrupt (Adjective) — Exceedingly sudden and unexpected. ex. "came to an abrupt stop" ex. "an abrupt change in the weather"
abrupt (Adjective) — Extremely steep. ex. "an abrupt canyon"
abrupt (Adjective) — Surprisingly and unceremoniously brusque in manner. ex. "an abrupt reply"