Here are some ways to use "abrupt" in a sentence:
* The conversation came to an abrupt end. (The conversation stopped suddenly and unexpectedly)
* The car stopped with an abrupt jerk. (The car stopped suddenly and with force)
* Her tone was abrupt and unfriendly. (She spoke in a way that was sudden, curt, and unfriendly)
Synonyms for abrupt:
* Sudden
* Sharp
* Unexpected
* Hasty
* Brusque
* Curt
Antonyms for abrupt:
* Gradual
* Smooth
* Gentle
* Slow
* Deliberate