abruptly

adjective

1. coming, happening, or ending suddenly; sudden; unexpected
2. curt or gruff in behavior or speech; brusque
3. very steep: said as of a precipice
4. jumping from topic to topic without proper transitions; jerky and disconnected
5. Geol. having sudden variations in composition, form, etc.: said esp. of adjacent rock formations

Etymology: L abruptus, pp. of abrumpere, to break off < ab-, off + rumpere, to break: see rupture