abrupt

steep, abrupt, sheer

这些形容词均含“陡峭的，险峻的”之意。
steep: 指坡度向上逐渐增加的斜陡坡，强调险峻，暗示难于攀登。
abrupt: 着重指地形突然起伏，形成尖角状。
sheer: 指自始至终近于垂直的陡峭，不仅仅很难爬上去，甚至于不可能攀登。

形容词 abrupt:

1. marked by sudden changes in subject and sharp transitions
   同义词：disconnected
2. exceedingly sudden and unexpected
3. extremely steep
   同义词：precipitous, sharp
4. surprisingly and unceremoniously brusque in manner

1. It's very unlike him to be so abrupt.
   他这麽粗鲁可不像他平时的样子。
2. An abrupt rolling or pitching.
   突然的摇晃或坠落
3. A heavy or abrupt fall or collision.
   坠落、碰撞重重的或突然的下落或碰撞
4. The meeting came to an abrupt end.
   会议突然结束了。
5. That young man has an abrupt manner.
   那个年轻人态度很无礼。