bump against(v.+prep.)
撞上 knock oneself into an object
▲bump against sth
I've bumped against the door again.我又撞到了门上。

bump into(v.+prep.)
1.撞上 knock oneself into an object
▲bump into sth
In the dark I bumped into a chair.我在黑暗中撞上了一把椅子。
▲bump sth into sth
I bumped my head into a low stone.我的头撞到了一块石头。
2.偶然碰见 meet sb by chance
▲bump into sb
I bumped into an old friend in town today.我今天在城里偶然碰见了一个老朋友。

bump along〔down〕¹(v.+adv.)
颠簸而行 move with a jolting action in the specified direction
▲bump along〔down〕 sth
The circulation of the magazine has been bumping along for some time at around 30,000.一段时间以来,杂志的销路一直在三万份上下摇摆。

bump along〔down〕²(v.+prep.)
颠簸而行 move with a jolting action in the specified direction
▲bump along〔down〕 sth
The car bumped along the rough mountain road.汽车在崎岖的山路上颠簸行驶。
The cart bumped down the track.马车在小路上颠簸着前进。

bump off(v.+adv.)
杀死某人,谋杀某人 kill sb; murder sb
▲bump sb ⇔ off
◇ 用于be ～ed结构
The old man who owned the jewels was bumped off by the thieves.那个拥有珠宝的老人被小偷谋杀了。

用作及物动词
▲S+～+n./pron.
I bumped the tree while reversing.司机倒车时撞到了那棵树。
The car bumped the kerb.汽车撞到路边石了。

bump, bang, bash, knock
参见bang条。

bump用作名词时的基本意思是“砰的一声；撞击”,是拟声词。引申可指因撞击而形成的肿块、瘤等; 也可指路面上的隆起之处。

I heard a bump in the next room.我听到隔壁房间传来“砰”的一声。
He got a nasty bump on the head.他头上起了一个大包。
She tripped over the bump on the sidewalk.她被人行道上一块隆起的地面绊了一下。