abruptness

The story

1. Latinabrumpō
2. Latinabruptus
3. Englishabrupt
4. English todayabruptness

From abrupt + -ness.

First known use, by meaning

• First attested in the early 17ᵗʰ century. The state of being abrupt or broken
• First attested in the early 17ᵗʰ century. Suddenness; unceremonious haste or vehemence.