| adjective | marked by sudden changes in subject and sharp transitions “abrupt prose” |
| adjective | exceedingly sudden and unexpected “came to an abrupt stop” |
| adjective | extremely steep “an abrupt canyon” |
| adjective | surprisingly and unceremoniously brusque in manner “an abrupt reply” |
| abruptness | noun | the quality of happening with headlong haste or without warning |
| precipitousness | noun | the property possessed by a slope that is very steep |
| precipice | noun | a very steep cliff |