形容词

1. 突然的，意外的（常指令人不快的改变或行为）
An abrupt change or action is very sudden, often in a way which is unpleasant.

1. surprisingly and unceremoniously brusque in manner

e.g. an abrupt reply

2. exceedingly sudden and unexpected

e.g. came to an abrupt stop
an abrupt change in the weather

3. extremely steep

e.g. an abrupt canyon
the precipitous rapids of the upper river
the precipitous hills of Chinese paintings
a sharp drop

Synonym: precipitoussharp

4. marked by sudden changes in subject and sharp transitions

e.g. abrupt prose

Synonym: disconnected