1. obstacle /ˈɔbstəkl/

-- something standing in the way; hindrance; obstruction; impediment

If we beat Central High tomorrow, we shall have removed the last obstacle between us and the championship.

如果我们明天击败中央中学，就扫除了我们与冠军之间的最后障碍。

 

 

2. obliterate /əˈblɪtəˌreɪt/

-- (literally, "cover over letters") erase; blot out; destroy; remove all traces of 

Today's rain has completely obliterated yesterday's snow; not a trace remains.

今天下的雨把昨天的积雪完全除去了，一点儿痕迹也没留。

 

 

3.  obsess /əbˈses/

-- (literally, "sit over") trouble the mind of; haunt

The notion that she had forgotten to lock the front door obsessed mother all through the movie.

看电影的时候，妈妈一直想着她忘了锁前门这事儿。

 

 

4. obstruct /əbˈstrʌkt/

-- be in the way of; hinder; impede; block

The disabled vehicles obstructed traffic until removed by a tow truck.

抛锚的车子直到被拖车拖走后才不再阻碍交通了。

 

 

5. obtrude /ɔbˈtru:d/

-- (literally, "thrust against") thrust forward without being asked; intrude

It is unwise for an outsider to obtrude his opinions into a family quarrel.

局外人硬把自己的想法加入一场家庭争论中是不明智的。

 

 

6. obviate /ˈɔbvi:ˌeɪt/

-- (literally, "get in the way of") meet and dispose of; make unnecessary

By removing her hat, the lady in front obviated the need for me to change my seat,

前座的小姐摘掉了帽子，使我不必换座位。