abruptness

Noun

• the quality of happening with headlong haste or without warning

• the property possessed by a slope that is very steep

• an abrupt discourteous manner

Related words

• Synonyms: 
  precipitateness , precipitousness , precipitance , precipitancy , suddenness , steepness , brusqueness , curtness , gruffness , shortness
• Antonyms: 
  gradualness , gentleness