"abruptness" in the noun sense
1. abruptness, brusqueness, curtness, gruffness, shortness
an abrupt discourteous manner
2. abruptness, precipitousness, steepness
the property possessed by a slope that is very steep
3. abruptness, precipitateness, precipitousness, precipitance, precipitancy, suddenness
the quality of happening with headlong haste or without warning
Source: WordNet® (An amazing lexical database of English)
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