四级单词词根

o大范围流行的•para-oparadropo空投，空降oparachuteo降落伞oparalogismo不合逻辑的推论表示“降落伞”oparagono典范oparadoxo矛盾的说法oparadigmo范例，示范oparapoliticalo半政治的表示“在旁边”oparastatalo半官方的•pn-,n-opansophico全知的opanegyrico颂词；颂扬opanoramao全景，概观opandemicoamericano泛美的•over-ooverhaulo彻底检修ooverthrowo推翻ooverturno颠覆oovercomeo战胜,克服表示“翻转”oovercoato外套ooverlooko俯视;疏忽ooverbridgeo天桥ooverwhelmo压倒;泛滥oiverrideo推翻,不理会ooverlapo重叠oovercrowdedooverproductiono生产过度ooverdoseo药物过量o全能的ooveracto表演过火ooverworko过度劳累ooverstudyo用功过度•out-ooutlawo歹徒ooutbido出价多于ooutwito以机智取胜ooutwearo穿破ooutsizeo过大的ooutnumbero在数量上超过ooutliveooutdoo胜过,战胜•omni-oomnisciento无所示在的oomnipotentoomnipresento无所不在的•non-ononconformisto不遵循传统竽活的人ononstopo直达的冷漠的ononsmokingo不准吸烟的ononexistento不存在的•neo-oneoterico新近的;现代的oneologismo新词oneophiliao喜新成癖oneolithico新石器时代的oneogamisto新婚者oneonatalo新生的,被生的•multi-omultitudeo多数;群众omultimediaomishapo多媒体的omulticulturalo多种文化的omultiformo多种多样的omultiplyo乘;繁殖omultipleo多样的;多功能的omultidirectionalo多方向的omultilingualo多种语言的•mono-omonotonouso单调的omonopolyo垄断omonologueo独白omonogamyo一夫一妻制omonarcho君主，独裁者•mis-omischievouso恶作剧的ominifyo坏运气，不幸omiscreanto恶棍omisanthropeo愤世嫉俗者omistrusto不信任omisfortuneo不幸omisruleomisdoingo坏事omisunderstando误解omisspello拼写错误omistakeo错误•mini-odeminisho缩小的，减少的ominiono仆人ominimumo最小量ominimalo最低限度的ominiatureo小画象，缩影ominiwaro小规模战争ominiskirto超短裙ominibuso小公共汽车•micro-omicrofilmo微缩胶卷omicrobiologyo微生物学omicrobeo微生物omicrowaveo微波omicroskirto超短裙omicroworldo微观世界omicroscopeo显微镜•mal-omaladroito笨拙的omalevolento恶意的omalapropismo字的误用omaltreato虐待omalodoro恶臭omalefactiono坏事，恶行omaledictiono诅咒omalnutritiono营养不良omalpracticeo不法行为omalcontento不满的•homo-ohomogenizeo使一致ohomocentrico同中心的相同的方面治疗ohomosexualo同性恋的ohomogeneouso同类的；同族的•macro-omacroclimateooooooooo•intro-oooooooooo•inter-ooooooo大气候acrobian长寿的macroscale大规模的macrostructure宏观结构macroworld宏观世界introversible可向内翻的omit插入，干预vertntrospect内省，反省troduce引入，介绍interrelate相互关连nterlude休息interchangeable可互换的interactiono相互影响ointerveneo干涉ointersecto横断ointerposeo置于，介入ointerpersonalo人与人之间的ointernationalo国际的•im-,in-oindooro户内的oinspiredo有灵感的oinflameo使燃烧；激怒oincorporateo合并，并入oincentiveo激励oinaugurateo举行就职典礼oinborno天生的oimpersonateo扮演，模仿oimplicitoimmutableo含蓄的oimpulseo冲动oimperilo处于危险中oimpelo驱动oimprisono监禁oinsubordinateo不服从的，反抗的表示“向内，进入”oinimitableo无可比拟的oinnocuouso无害的oindifferento冷漠的oinconstanto多变的，无常的oincorrigibleo积习难改的oinjusticeo不公正oinhumanoincapableo无能力的oingloriouso不光彩的o不变的oimmortalo不朽的oimpeccableo无瑕疵的oimpassiveo无动于衷的oimpartialo公平的oimpoliteo无礼的oimmoralo不道德的oimpossibleo不可能的•il-,ir-oirritateo激怒；刺激oirradiateo使明亮，生辉oirruptiono闯入，冲入oillusoryo虚幻的oillusiono幻觉oilluminateo照亮；使明白oillustrateo说明，阐明oirrevocableo不可取消的表示“使…成为，进入”oirresistibleo不可抗拒的oirrefutableo无可反驳的oirreproadchableo无可指责的oirresoluteo无决断力的oirrelativeo无关的oirrationalo不合理的oirregularo不规则的oillimitableo无限的oillogicalo不合逻辑的oilliterateo不识字的oillegalo非法的•hypo-ohypotrophyo发育不良ohypomnesiao预料o记忆力减退ohypothesiso假说，假设ohypodermico皮下的•hyper-ohypertensiono过度紧张；高血压ohyperboleo夸张法ohypercriticalo吹毛求疵的ohypersensitiveo过敏的ohyperactiveo活动过度的•hetero-oheterogeneouso异类的，不同的oheterodoxyo异教，异端oheterosexualo异性的•foe-oforeshadowo预示，暗示oforecastoforefathero前人，祖先oforebodeo预兆；凶兆oforestallo阻止•extra-oextravioleto紫外线的oextrapolateo推断oextroverto性格外向的oextravaganto奢侈的oextraneouso外来的oextrasolaro太阳系以外的oextraordinaryo格外的oextracurriculumo课外的•exo-oexothermico放出热量的oexoduso大批移出oexposeoexosphereo外大气层▪forearm▪前人，祖先oexocentrico外向的，离心的oexoterico外界的，外面的oexotico来自异国的•ex-,ex-,ex-opresidento前任总统owifeo前妻oexpurgateoexhumeo掘出，挖出oexhaleo呼气oexceedo超过，超出oexciseo切除oextracto抽出，拔出oexalto使升高o暴露oexpelo赶出，逐出oexcludeo排外•eu-oeugenicso优生学oeuphoriao幸福愉快感oeurhythmico协调的oeuphoniouso声音优美的oeuphemismo委婉的词语oeulogizeo赞美•epi-oepitomeo梗概，缩影oepisodeo一段经历，片段oepilogueo后记，结尾部分oepigramo警句，格言oepidemico流行性的•em-,en-oenlighteno启发，开导oencourageo鼓励oendangero使危险oencompasso包围，围绕oenchanto使迷醉oenacto制定；颁布oemphrealo天空的oembosso使凸出oembellisho装饰oembodyo体现oembittero使痛苦oempowero授权oenchainoencageo关入笼中•dys-oenrollo注册，记入名册oembattleo整军备战oembarrasso使难堪oempathyo感情相融的oembedo安置；嵌于oembraceo拥抱•e-,ef-oeffluenceo流出oeradicateo根除，灭绝oevadeo逃出，逃避oemergeo浮现oejecto投出，掷出oelaborateo精工细做的oelongateo延长，拉长odispelodystrophyo营养不良odyspepsiao消化不良•dis-odiscusso讨论odiscardo丢弃，抛弃odisburseo支付，支出odismisso解散；开除odiscriminateo辨别；歧视odistendo膨胀odistracto分心odispenseo分配odisseminateo散布，传播odismayodiscovero发现odispassionateo平心静气的•dia-o驱除，消除odisarmo解除武装odiscourageo使失去勇气odisproofo反证，反驳odisappearo消失odishonesto不诚实的odisordero无秩序odislikeo不喜欢•dif-odifformo不同形式的；不规则的odifficulto困难的odiffuseo散布的，散开的odiffidento自卑的odifferenceo不同odiffero不同odiagramo图表odiagnosiso诊断odialectico辩证法odiaphanouso透明的；精致的odiametero直径odialogueo对话•di-,n-,n-oalo婚姻的，结婚的omatrimonyo婚姻，结婚ometromatriarcho女族长；女家长omatero;omatro;opaternalismo家长式统治，家长作风母－oalo父亲的，父系的opatenalounpatrioticopatriotismo爱国主义；爱国心ooticopatriotopatriarchalo家长的；族长的；家长似的opaterpatriarcho家长；族长oparto;opatro;odivorceo离婚父，祖－odivideo分开odigresso离题odiminisho减少；消失odigesto消化；文摘odiluteo冲淡，稀释odilateo膨胀，扩大odichotomizeodilemmao进退两难odioxideo二氧化物odichromatico两色的•de-odefinitiono定义；清晰odesigno设计；计划odepicto描绘odelimito划定界限odefameodecodeo破译odecelerateo减速odetraino下火车odepresso压制，压抑odevalueo降低价值odeforesto砍伐森林o冲突odesaltodestructiono破坏•counter-ocountermando撤消ocounterbalanceo平衡ocounteracto对抗；抵消•contra-ocontrabando走私ocontraveneo违反，违背ocontradicto反驳；矛盾ocontraryo相反的•com-,con-oconsoleo安慰ocongregateo集合的，聚集的oconfluenceo汇流oconflicto纪念oconsolidateo巩固，加强ocondenseo凝结；浓缩oconfirmo坚定；证实oconcludeo结束；总结ocontemporaryo同时代的oconcentrico同中心的ocompresso压缩ocomponento成分ocompeteo比赛ocommodiousocomforto安慰ocompacto紧密的；合同ocomparisono比较ocommensurableo相等的，相称的ocommemorateo回避ocommendo赞扬；推荐ocompatrioto同胞ocompassiono同情ocombineo联合，结合•col-ocor•co-ocoordinateo协调：同等的ocoincideo一致，符合，巧合ocohereo附着；粘着ocoexisto共存ocoalesceo联合；合作ocoagulateo凝结ocooperationo合作•circum-ocircumventocircumspecto小心谨慎的ocircumscribeo限制ocircumnavigateo环航世界ocircumferenceo周长ocircumciseo环割•by-obyworko副业obypasso旁路；忽略obygoneo过时的obywayo小道obyroado辅路obyproducto副产品•bi-obiannualo一年两次的obiennialo两年一次的oooo•bene-oooooooooo•be-ooooooooooooal双语种的kly双周刊beneficent仁慈的，善行的benediction祝福好处，利益benefaction好事；恩惠benewolent好意的在下面在前面r小看降临；发生欺骗obefriendo友好对待obewareo注意obesiegeo围攻obequeatho遗留给，传下obelieo掩盖obeguileo欺骗•anti-oantibodyo抗体oantibacterialo抗菌的oantithesiso对立；反论oantipathyo反感oantiwaro反战的•ante-oantecedentoooanterioro前面的oantedateo提前写日期；先于，早于•ana-oanalysiso分析oanalogouso类似的oanalogyo类比；类似•an-oanonymouso匿名的oanechoico无回声的oanharmonico不和谐的oanarchismo无政府主义•amphi-oamphicaro水陆两用车oamphibiano两栖动物•ad-oadvento来临，来到oadmonisho告诫，警告oadventureo冒险oadjusto调整oadumbrateo预示oadmireo羡慕oadministrateo管理；执行oadjoino贴近；毗连oadjacento邻近的oadhereo坚持oadopto收养；采纳oadepto熟练的oadapto适应•ab-,ac-,ad-,af-,ag-,n-,ap-,ar-,as-,at-oaggravateo恶化oaggrandizeo扩大oaggressiono侵略，进攻oaffirmo肯定oaffordo买得起oaffableo亲切的oadduceo引证，举例oadditiveo上瘾的oaddicto上瘾，入迷oaccustomo使习惯oaccumulateo积累oaccomplisho强制oaccentuateo加速oaccelerateo陪伴•a-oawasho泛滥的oaliveo活的oaheado在前地oasideo在边上oasleepo睡着的oanemiaoamoralo非道德性的不关政治的oasocialo不好社交的oacentrico无中心的•ab-,abs-oabstinenceo节制；禁欲oabsciseo切除oabscindo废除oabscondo潜逃oabstaino戒绝oabstracto抽象的；心不在焉的oabjecto可怜的oabducto诱拐•twi-oabsento缺席的oabsorbo吸收oabuseo滥用oabnormalo反常的•with-owithholdo阻止第三部分通过词根认识单词owithdrawno隐退owithdrawo撤消，撤退•vice-,vice-,vice-omanagero副经理opresidento副总统•uni-ounisono和谐，协调ouniqueo独一无二ouniformo一贯的，一致的o立体图otwiformedo有两种形式的otwilighto黎明，黄昏•tri-otripodo三脚架otripleo三倍的otricycleo三轮脚踏车otriangleo三角形•tetra-otetragono四角形otetracyclineo四环素•supra-,supra-osupramundaneo超现世的osupranatonalo超国家的oclasso超阶级的•stereo-ostereoramoooo•step-oooooo•sex-oooo•septi-oooooooo•semi-oosterograph立体照片stereosonic立体声的stepbrother异父兄弟stepdaughter前夫之女stepfather继父foil六叶形sexangle六角形september九月septiateral七边的septangle七角形semiautomatic半自动的•octa-osemicircleo半圆osemiconductoro半导体osemicolonyo半殖民地osemimonthlyo半月刊•quasi-,quasi-,quasi-ojudicialo准司法性的oofficialo半官方的•quadri-,quadru-oquadrilateralo四边的oquadricycleo四轮车oquadrangleo四角形•penta-opentoxideo五氧化物opentagramo五角星形opentagono五角形；五角大楼ooctolateralo八边的ooctobero十月ooctagono八角形•ob-oobsoleteo钝的；愚蠢的oobsoleteo过时的oobscureo模糊的oobliviono忘却，忘记oobliqueo倾斜的•milli-omillimetero毫米omillennialo一千年的•meta-ometapsyo超心理学，灵学ometaphysiso形而上学ometaphoro党内的ooooo•kilo-oooooo•iso-oooooo•intra-ooooooo喻metamorphism变形；变性metabolism新陈代谢t千瓦eter公里gram公斤isomorphic形的nyotherm等温线intranational国内的intrapersonal个人内心的intracollegiate大学内的traparty•holo-oholographyo全息摄影•hexa-ohexagono六角形•hepta-oheptagloto使用七种语言的oheptagono七角形•hemi-ohemicycleo半圆形ohemisphereo半球•hecto-ohectowatto一百瓦ohectogramo一百克•endo-oendocardialo心脏内的oendogenouso内生的，自生的•demi-,demi-oooooooo•deci-oooooo•deca-oooo•cata-ooooooofixed半固定的demirep名声不好的女人demilune半月demigod半神半人decimate大量毁灭decigram十分之一克decimeter十分之一米decameter十米decagon十角形cataract大瀑布catastrophe灾难，大祸catalogcataclysmo洪水；大灾难•unper-ounderdevelopedo不发达的ounderpopulatedo人口稀少的ounderplayounderestimateo估计不足ounderwearo内衣表示“不足，不够”ounderclothingo内衣裤ounderlingo下属oundermineo破坏，损坏ounderseao在海底ounderlineounderwriteoundergroundo地下的•un-ounravelo非尘世的o解开；拆散ounbosomo吐露ouneartho从地下挖出ountombo掘墓oundresso脱衣服ouncovero揭开盖子ounbuttono解开钮扣ounbindo解开ounlocko开锁ounchartedo图上没标明的表示“打开，解开，弄出”ounalloyedo未掺杂的oundecidedo未决定的ouncivilizedo未开化的ouneducatedo未受教育的ounworldlyounjusto非正义的ounofficialo非官方的ounfailingo无尽的，无穷的ounconscionableo无节制的ounambitiouso无野心的ounlimittedo无限的ounconditionalo无条件的ountowardo不幸的；逆境的ounscrupulouso肆无忌惮的ouncommittedo不承担责任的ounassumingo不摆架子的ounabashedo不害臊的ounfortunateo不幸的ounequalo不平等的ounrealo不真实•ultra-,ultra-oultravioleto紫外线的oultraredo红外线的oultramundaneo超俗的oultramoderno超现代化的oultrasonico超音速的oultraliberalo极端自由主义的表示“超出，超过”oreactionaryo极端反动的oultracleano极洁净的oultramilitanto极端好战的oultrapureo极纯的•trans-otransmogrifyo变得古怪，变形otransitoryo短暂的otransfuseo输血；充满otransfigureo改观；变形otranscribeo抄写，转录otransactiono交易；办理otranplanto移植otransecto横切，横断表示“变换，改变，转移”otransparento透明的otransmito传送，传播otransgresso冒犯；违背otranscendo超越，胜过otransnormalo超出常规的otranscontinetalo横贯大陆的•sym-,syn-osyndromeo综合症状osynopsiso摘要，概要osynthesiso合成osynonymo同义词osynchronouso同时发生的osymposiumo专题讨论会osymbiosiso共生osymmetryo对称osymphonyo交响乐osympathyo同情•sus-osustenanceo生活资料，粮食osustaino支撑；承受osuspireo叹息，渴望osuspenseo担心；悬而不决osuspendo悬挂，中止osuspecto怀疑osusceptiveo有接受力的；敏感的osusceptibleo易受感染的，易受影响的•super-osupersedeo淘汰；取代osuperintendo监督osuperficialo肤浅的osuperimposeosuperstructureo上层建筑osuperviseo临视osuperchargeo负载过重表示“在…上面”osupersensitiveo过度敏感的osuperciliouso目中无人的osuperfluouso多余的osupernaturalo超自然的osupersonico超音速的osupersizedo超大型的•sur-osurvivalo幸存，生存osurveillanceo临视；看守osurchargeo附加费osurpluso多余的osurmounto登上，超越osurrealismo超现实主义osurpasso超过osurfaceo表面•suc-,suf-,sup-,sur-osurroundingo环境osurroundo包围osurrogateo代替品；代理人osurreptitiouso鬼鬼崇崇的osupposeo猜想，推测osuppresso镇压，压制osupporto支持osupplicateo恳求,乞求osupplicanto哀求的恳求的osupplanto排挤，取代osuffuseo弥漫，染遍osuffocateo窒息osuffixo后缀osuffero受苦osufficiento足够的osuccumbo屈从；死亡osuccincto简洁的，简明的osucceedo成功•sub-osubarido附属的o有点干燥的osubacido略酸的osubadulto接近成年的osubaratico近北极的osubcentralo接近中心的osubofficeo分办事处表示“接近，靠近”osubeditoro助理编辑osubtitleo副标题osubtropicso亚热带osubcontinento次大陆osubterraneano地下的osubsideo下陷；平息osubscribeo捐献，订购osuborno收买，贿赂osubordinate•retro-osubmissiveo恭顺的osubmergeo沉没，淹没osubliminalo潜意识的osubjugateo镇压；征服osubdueo征服；减轻•se-oselecto选出osevero切断；脱离osegregateo隔离oseduceo勾引，诱惑oseditiono煽动叛乱osecreteo分泌；藏匿osecludeo和别人隔离；隐居osecedeo正式退出oretrovertoretrojecto向后投射oretroactiono倒行，反动oretrospecto回顾，回想oretrogresso倒退，退化oretrogrado后退，倒退•re-oreverberateo起回声，反响oresurgenceo复兴，再起oreiterateo重申oreinstateo重新恢复职位oreincarnateo化生，转生oregenerateo改过自新的orefurbisho刷新；擦亮orecompenseo报酬；赔偿orelinquishorecommendo赞扬；推荐oreclaimo取回,回收orecidivismo重新犯罪orecapitulateo重述；概括oreassureo消除某人疑虑orearrageo重新安排oreappearo再出现oresplendento辉湟的oresonanto回响的；洪亮的表示“一再，重新”orepugnanto