Abrupt

[PussyCat]

Broken off; very steep, or craggy, as rocks, precipices,
banks; precipitous; steep; as, abrupt places.

[Tanya Shivari]

Sudden, without ceremony, like the arrival of a cannon shot and the [departure] of the soldier whose interests are most affected by it. Dr [Samuel Johnson] beautifully said of anothers [authors] ideas that they were concatenated without abruption

[Merna]

Sudden and unexpected.