'abruptness' definitions:

An abrupt discourteous manner [syn: abruptness, brusqueness, curtness, gruffness, shortness]

The property possessed by a slope that is very steep [syn: abruptness, precipitousness, steepness] [ant: gentleness, gradualness]

The quality of happening with headlong haste or without warning [syn: abruptness, precipitateness, precipitousness, precipitance, precipitancy, suddenness]