a.

1. 突然的；意外的
   The abrupt change of schedule gave me lots of trouble.

   行程突然改變給我造成許多麻煩。

2. （態度等）唐突的，魯莽的
   She was offended by his abrupt manner.

   他的粗率無禮的舉止觸怒了她。

3. 陡峭的，險峻的
   She did not dare to bike down the abrupt slope.

   她不敢騎著自行車衝下陡峭的斜坡。

4. （文章風格等）不連貫的

adj.

1. sudden and unexpected.
2. brief to the point of rudeness; curt.
3. (of a slope) steep.