WordWeb Online

1. An abrupt discourteous manner
   "his antagonistic abruptness";
   - brusqueness, curtness, gruffness, shortness
    
2. The property possessed by a slope that is very steep
   - precipitousness, steepness
    
3. The quality of happening with headlong haste or without warning
   - precipitateness, precipitousness, precipitance, precipitancy, suddenness

Type of: discourtesy, gradient, haste, hastiness, hurriedness, hurry, precipitation, rudeness, slope

Antonym: gentleness