2018考研英语大纲核心词汇：O

object 物体，事物 cultural ～s
　　objective 目的，宗旨 political ～s
　　oblige 强迫，迫使 In certain countries the law ～s parents to send their children to school
　　obscure 晦涩的，费解的 an ～ text
　　obsolete 废弃的，淘汰的 Wooden warships are ～.
　　obstinate 顽固的，固执的，倔强的 The girl would go her own way, in spite of all warnings
　　occasion 时刻，场合 They met on three ～s
　　occupy 占用，占有 My books ～ a lot of space
　　occur 发生，存在，出现 when did the earthquake ～?
　　odd 的奇数的，单的，奇怪的 One ,three five are ～numbers
　　offend 冒犯，使生气 She was afraid of ～ing anyone.
　　offence 犯法行为，过错 They were arrested for drug ～s.
　　offset 补偿，抵消 They gains ～the losses.
　　omit 省略，删去 Minor points may be omitted.
　　opaque 不透明的 A brick wall is ～.
　　optimistic 乐观的，乐观主义的
　　option 选择权 It is your ～ to take it or leave it
　　orient 东方，东方国家 political theory in the West and in the Orient
　　origin 起源，由来 a word of Latin ～
　　ornament 装饰品，点缀品 We bought ～s for the Christmas treeorthodox 正统的，正宗的 an ～ economic theory
　　outline 轮廓，外形 He saw the ～ of a house against the sky
　　overflow 泛滥 Every spring the river ～s
　　overhaul 大修，全面检查，彻底革新～ a faulty machine
　　overhear 偶然听到，偷听到 I wouldn’t like to be ～d
　　overlap 重叠，部分相同 The Renaissance overlapped the later Middle Ages
　　overtake 赶上，超过 He ran out of the door to ～ her
　　overthrow 推翻，打倒 a plot to ～ the government
　　overwhelm 征服，压倒，毁坏 He took 45% of the ballots and ～ed his two main rivals考研