abrupt

adjective

1
surprisingly and unceremoniously brusque in manner
an abrupt reply
2
exceedingly sudden and unexpected
came to an abrupt stop
an abrupt change in the weather
3
extremely steep
an abrupt canyon
the precipitous rapids of the upper river
4
marked by sudden changes in subject and sharp transitions
abrupt prose

Also useful for “abrupt”:Unscrambler— Rearrange the letters in “abrupt”