- 承接《词汇 nebulous–onerous》，继续按字母顺序收录 C2 词表，这篇收 O 开头到 P 开头的一批（onset - pang）。
- 涵盖表演/仪式相关词（pageant、pageantry、ovation）和"表面/虚假"类形容词（ostensible、ostentatious），部分词根相同，容易混。
- 学完继续扩充高阶词汇量。
重点内容
| 英文 | 音标 | 中文 | 例句 | 常用搭配 |
|---|---|---|---|---|
| onset (n.) | /ˈɒnset/ | 开始；发作 | the onset of the disease was sudden | the onset of winter |
| onslaught (n.) | /ˈɒnslɔːt/ | 猛攻；冲击 | an onslaught of criticism followed | face an onslaught |
| onus (n.) | /ˈəʊnəs/ | 责任；义务 | the onus is on you to prove it | the onus is on |
| opacity (n.) | /əʊˈpæsəti/ | 不透明；晦涩 | criticized for the opacity of the process | a lack of opacity |
| opaque (adj.) | /əʊˈpeɪk/ | 不透明的；难懂的 | an opaque glass panel | an opaque explanation |
| opportunistic (adj.) | /ˌɒpətjuːˈnɪstɪk/ | 投机取巧的 | an opportunistic business move | opportunistic behaviour |
| opulence (n.) | /ˈɒpjələns/ | 富丽；豪华 | the sheer opulence of the palace | display of opulence |
| opulent (adj.) | /ˈɒpjələnt/ | 富丽堂皇的 | an opulent hotel lobby | an opulent lifestyle |
| oracle (n.) | /ˈɒrəkl/ | 神谕；预言者 | consulted the oracle before battle | the ancient oracle |
| orator (n.) | /ˈɒrətə(r)/ | 演说家 | a gifted public orator | a skilled orator |
| oratory (n.) | /ˈɒrətri/ | 演讲术；辩才 | famous for his political oratory | powerful oratory |
| ordeal (n.) | /ɔːˈdiːl/ | 磨难；折磨 | survived a terrifying ordeal | a painful ordeal |
| ordinance (n.) | /ˈɔːdɪnəns/ | 法令；条例 | a city ordinance banning smoking | issue an ordinance |
| ornate (adj.) | /ɔːˈneɪt/ | 装饰华丽的 | an ornate wooden frame | an ornate design |
| orthodoxy (n.) | /ˈɔːθədɒksi/ | 正统观念 | challenged the prevailing orthodoxy | economic orthodoxy |
| oscillation (n.) | /ˌɒsɪˈleɪʃn/ | 摆动；波动 | the oscillation of public opinion | rapid oscillation |
| ostensible (adj.) | /ɒˈstensəbl/ | 表面上的 | the ostensible reason for the visit | the ostensible purpose |
| ostentation (n.) | /ˌɒstenˈteɪʃn/ | 卖弄；炫耀 | disliked the ostentation of the wedding | vulgar ostentation |
| ostentatious (adj.) | /ˌɒstenˈteɪʃəs/ | 炫耀的 | an ostentatious display of wealth | an ostentatious car |
| ostracise (v.) | /ˈɒstrəsaɪz/ | 排斥；孤立 | ostracised by his former friends | ostracise someone |
| ostracism (n.) | /ˈɒstrəsɪzəm/ | 排斥；放逐 | faced social ostracism | social ostracism |
| oust (v.) | /aʊst/ | 驱逐；罢免 | ousted from power in a coup | oust from office |
| outweigh (v.) | /ˌaʊtˈweɪ/ | 超过；胜过 | the benefits outweigh the risks | outweigh the risks |
| ovation (n.) | /əʊˈveɪʃn/ | 热烈欢呼；喝彩 | received a standing ovation | a standing ovation |
| oversight (n.) | /ˈəʊvəsaɪt/ | 疏忽；监督 | a regrettable oversight in the report | regulatory oversight |
| overweening (adj.) | /ˌəʊvəˈwiːnɪŋ/ | 自负的；过分的 | overweening pride led to his downfall | overweening ambition |
| oxymoron (n.) | /ˌɒksɪˈmɔːrɒn/ | 矛盾修辞法 | "deafening silence" is an oxymoron | a classic oxymoron |
| pacifism (n.) | /ˈpæsɪfɪzəm/ | 和平主义 | committed to pacifism his whole life | strict pacifism |
| pacify (v.) | /ˈpæsɪfaɪ/ | 安抚；平息 | tried to pacify the angry crowd | pacify a crowd |
| pageant (n.) | /ˈpædʒənt/ | 盛会；选美 | won the local beauty pageant | a beauty pageant |
| pageantry (n.) | /ˈpædʒəntri/ | 盛大排场 | the pageantry of the royal wedding | royal pageantry |
| painstaking (adj.) | /ˈpeɪnzteɪkɪŋ/ | 煞费苦心的 | painstaking attention to detail | painstaking research |
| palatable (adj.) | /ˈpælətəbl/ | 可口的；可接受的 | made the plan more palatable to voters | a palatable option |
| palatial (adj.) | /pəˈleɪʃl/ | 宫殿般的 | lived in a palatial mansion | a palatial residence |
| pallbearer (n.) | /ˈpɔːlbeərə(r)/ | 抬棺者 | asked to be a pallbearer at the funeral | act as pallbearer |
| palliate (v.) | /ˈpælieɪt/ | 缓和；减轻 | drugs used to palliate the pain | palliate the symptoms |
| pallid (adj.) | /ˈpælɪd/ | 苍白的 | a pallid, sickly complexion | a pallid face |
| pallor (n.) | /ˈpælə(r)/ | 苍白 | noted the pallor of her skin | a deathly pallor |
| palpable (adj.) | /ˈpælpəbl/ | 明显的；可感知的 | the tension in the room was palpable | palpable tension |
| palpitation (n.) | /ˌpælpɪˈteɪʃn/ | 心悸 | experienced palpitations under stress | heart palpitations |
| paltry (adj.) | /ˈpɔːltri/ | 微不足道的 | offered a paltry sum in compensation | a paltry amount |
| pamper (v.) | /ˈpæmpə(r)/ | 娇惯；纵容 | pampered by doting parents | pamper oneself |
| panacea (n.) | /ˌpænəˈsiːə/ | 万灵药 | no single panacea for the crisis | a panacea for all ills |
| panache (n.) | /pəˈnæʃ/ | 派头；神采 | performed the piece with panache | with great panache |
| pandemonium (n.) | /ˌpændəˈməʊniəm/ | 大混乱 | pandemonium broke out in the stadium | sheer pandemonium |
| pang (n.) | /pæŋ/ | 一阵剧痛；痛苦 | felt a pang of guilt | a pang of regret |
*ostensible*（表面上的，指看起来如此但可能不是真相）跟 *ostentatious*（炫耀的，指故意夸张地展示）虽然词形相近但意思完全不同，容易混淆，注意区分。
Sources
Blog / Website：