abrupt
adjective
marked by sudden changes in subject and sharp transitions
“abrupt prose”
Synonymsdisconnectedexceedingly 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”
surprisingly and unceremoniously brusque in manner
“an abrupt reply”
Source: WordNet 3.1, Princeton University
