v. 起源于，来自，产生( originate的过去式和过去分词 )，创造，创始，开创；

[例句] The disease originated in Africa...

[例句] All carbohydrates originate from plants...

v. 驱逐( oust的过去式和过去分词 )，革职，罢黜，剥夺；

[例句] The leaders have been ousted from power by nationalists...

[例句] Last week they tried to oust him in a parliamentary vote of no confidence.

n. 爆发，突然发生( outbreak的名词复数 )；

[例句] The four-day festival ended a day early after an outbreak of violence involving hundreds of youths.

[例句] ...the outbreak of war in the Middle East...

v. 时刻困扰( obsess的现在分词 )，缠住，使痴迷，使迷恋；

[例句] I must admit that maps obsess me...

[例句] A string of scandals is obsessing America...

n. 被抛弃者，被排斥者( outcast的名词复数 )；

[例句] He had always been an outcast, unwanted and alone...

[例句] All of us felt like social outcasts.

v. 做得比…更好，（在赛跑等中）超过( outstrip的过去式和过去分词 )；

[例句] In the mid-eighteenth century the production of food far outstripped the rise in population...

[例句] In 1989 and 1990 demand outstripped supply, and prices went up by more than a third.

n. 遵守，奉行，庆祝( observance的名词复数 )；

[例句] Local councils should use their powers to ensure strict observance of laws.

v. （使）失去平衡而歪倒( overbalance的过去式和过去分词 )；

[例句] He overbalanced and fell head first.

v. 强行向前，强行，强迫( obtrude的过去式和过去分词 )；

[例句] A 40 watt bulb would be quite sufficient and would not obtrude...

[例句] Gertrude now clearly felt that she had obtruded her sorrow...

v. （向…）抛媚眼，送秋波( ogle的现在分词 )；

[例句] All she did was hang around ogling the men in the factory...

[例句] Paula is not used to everyone ogling at her while she undresses backstage.

v. 认为，以为( opine的过去式和过去分词 )；

[例句] 'She's probably had a row with her boyfriend,' Charles opined...

[例句] He opined that the navy would have to start again from the beginning.

v. 放逐( ostracize的过去式和过去分词 )，流放，摈弃，排斥；

[例句] She claims she's being ostracized by some members of her local community.

v. 以智取胜，以计击败( outwit的过去式和过去分词 )；

[例句] To win the presidency he had first to outwit his rivals within the Socialist Party...

[例句] Seeing how cleverly he had been outwitted he made no complaint.

v. 因过于雄心勃勃而失败( overreach的过去式和过去分词 )；

[例句] He overreached himself and lost much of his fortune...

[例句] The company had overreached itself and made unwise investments...

v. 批驳，推翻，拒绝( overrule的过去式和过去分词 )；

[例句] In 1991, the Court of Appeal overruled this decision...

[例句] I told them it was a lousy idea, but I was overruled.

n. 前兆，预兆( omen的名词复数 )；

[例句] Her appearance at this moment is an omen of disaster...

[例句] Could this at last be a good omen for peace?

v. 胜过，击败( outplay的过去式和过去分词 )；

[例句] We outplayed the Australians...

[例句] He was outplayed by the Swedish 21-year-old.

v. 服从，听从( obey的第三人称单数 )，遵守，遵循；

[例句] Cissie obeyed her mother without question...

[例句] Most people obey the law...

n. 气味，臭气( odour的名词复数 )；

[例句] The whole herb has a characteristic taste and odour...

[例句] The taste is only slightly bitter, and there is little odour.

n. 矿物，矿石( ore的名词复数 )；

[例句] ...a huge iron ore mine.